Oporná a pohybová sústava je tvoj vnútorný "stavebný systém" -... Show more
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Stavba a funkcia kostrového systému a svalov
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Základy opornej a pohybovej sústavy
Tvoje telo funguje ako dokonalá stavba, kde oporná sústava je pasívna konštrukcia a pohybová sústava je aktívny motor. Oporná sústava zahŕňa kosti, chrupavky, kĺby a väzy - všetko, co ti dáva oporu. Pohybová sústava sú tvoje svaly, ktoré sa sťahujú a uvoľňujú.
Kostra je tvoja základná opora zložená zo všetkých kostí. Kosti nie sú mŕtve štruktúry - sú to živé tkanivá, ktoré sa neustále obnovujú. Kĺby sú pohyblivé spojenia kostí, zatiaľ čo svaly sa pripájajú ku kostiam pomocou šliach.
Väzy spájajú kosti navzájom v kĺboch a okostica je vonkajší obal kosti s cievami a nervami. V kostnej dreni sa tvoria tvoje krvné bunky - červená dreň ich produkuje, žltá je tukovou zásobárňou.
💡 Tip na zapamätanie: Šľacha spája sval s kosťou, väz spája kosť s kosťou!
Stavba a funkcie kostry
Tvoja kostra má päť hlavných funkcií, ktoré musíš poznať na skúšku. Dáva telu oporu a tvar, chráni dôležité orgány (lebka mozog, hrudník srdce), slúži ako páky pre svaly, tvorí krvné bunky a skladuje minerály.
Stavba kosti je fascinujúca - okostica zabezpečuje výživu a rast, kompaktná kosť je pevná vonkajšia vrstva, špongiózna kosť má sieťovitú štruktúru vo vnútri. Červená kostná dreň tvorí krvné bunky hlavne v plochých kostiach, žltá dreň je tuková zásoba v dlhých kostiach.
Kosti delíme podľa tvaru na dlhé (stehenná, ramenná), krátke (zápästie), ploché (lebka, lopatka) a nepravidelné (stavce). Pevné spojenia sú švy lebky, pohyblivé spojenia sú kĺby.
💡 Zaujímavosť: Tvoje kosti sa kompletne obnovia každých 7-10 rokov!
Kĺby - pohyblivé spojenia
Kĺby sú miesta, kde sa stretávajú kosti a umožňujú pohyb. Kĺbové plochy sú pokryté hladkou kĺbovou chrupavkou, ktorá znižuje trenie. Kĺbové puzdro uzatvára kĺb a obsahuje synoviálnu tekutinu, ktorá mazáva a vyživuje chrupavku.
Typy kĺbov sa líšia rozsahom pohybu. Guľovitý kĺb (rameno, bedro) umožňuje pohyb vo všetkých smeroch, vajcovitý (zápästie) v dvoch rovinách, valcový (lakeť, koleno) len ohýbanie a naťahovanie. Plochý kĺb má obmedzený posuvný pohyb.
Väzy spevňujú kĺbové puzdro a držia kosti pohromade. Bez nich by sa kĺby vykĺbili pri každom pohybe. Kĺbová dutina je priestor vyplnený synoviou - bez nej by kĺby škrípali ako neolejované pánty.
💡 Praktický tip: Pri športovaní chráň kĺby správnou technikou a rozohriavaním!
Svaly - motorv tela
Svaly sú aktívna časť pohybového aparátu, ktorá vytvára silu na pohyb. Máš tri typy svalov: hladké v orgánoch (neovládaš ich), priečne pruhované na kostiach (ovládaš vôľou) a srdcový (špecifický, rytmicky sa sťahuje).
Kostrové svaly majú svalové bruško (mäsitá časť) a šľachy (pevné konce pripájajúce ku kostiam). Vnútri sú svalové vlákna s kontraktilnými bielkovinami aktín a myozín, ktoré sa po sebe posúvajú pri sťahovaní.
Princíp kontrakcie funguje jednoducho: príde nervový impulz, svalové vlákna sa posúvajú a skracujú, sval sa stiahne. Potrebuješ na to energiu (ATP) a vápnik. Antagonizmus svalov znamená, že pracujú v pároch - ohýbač (biceps) vs naťahovač (triceps).
💡 Zaujímavosť: Tvoje svaly produkujú teplo, preto sa pri zime triaskeš - svaly sa rýchlo sťahujú!
Praktické príklady a zdravie
Keď zdvíhaš knihu, tvoj nervový systém pošle signál, biceps sa stiahne, triceps sa uvoľní, lakťový kĺb sa ohne a predlaktie sa zdvihne. Kosti fungujú ako páky, na ktoré pôsobí svalová sila.
Pri zlomenine sa spustí proces hojenia: vytvorí sa krvná zrazenina, potom mäkký kalus, ktorý sa postupne zmení na kostné tkanivo. Imobilizácia (sadra) a správna výživa sú kľúčové pre hojenie.
Pre zdravú opornú a pohybovú sústavu potrebuješ dostatok vápnika a vitamínu D - vápnik je stavebný materiál, vitamín D pomáha jeho vstrebávanie. Pravidelný pohyb posilňuje svaly a udržiava kosti pevné, pretože reagujú na záťaž.
💡 Tip pre skúšku: Zapamätaj si rozdiely - šľacha spája sval s kosťou, väz spája kosť s kosťou v kĺbe!
We thought you’d never ask...
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Where can I download the Knowunity app?
You can download the app from Google Play Store and Apple App Store.
Is Knowunity really free of charge?
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
Most popular content in Biológia
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Can't find what you're looking for? Explore other subjects.
Students love us — and so will you.
4.6/5
App Store
4.7/5
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
Stavba a funkcia kostrového systému a svalov
Oporná a pohybová sústava je tvoj vnútorný "stavebný systém" - dáva ti tvar, drží ťa pokope a umožňuje ti hýbať sa. Bez nej by si bol len kopa mäsa a orgánov, takže je to jedna z najdôležitejších sústav v tele.
Základy opornej a pohybovej sústavy
Tvoje telo funguje ako dokonalá stavba, kde oporná sústava je pasívna konštrukcia a pohybová sústava je aktívny motor. Oporná sústava zahŕňa kosti, chrupavky, kĺby a väzy - všetko, co ti dáva oporu. Pohybová sústava sú tvoje svaly, ktoré sa sťahujú a uvoľňujú.
Kostra je tvoja základná opora zložená zo všetkých kostí. Kosti nie sú mŕtve štruktúry - sú to živé tkanivá, ktoré sa neustále obnovujú. Kĺby sú pohyblivé spojenia kostí, zatiaľ čo svaly sa pripájajú ku kostiam pomocou šliach.
Väzy spájajú kosti navzájom v kĺboch a okostica je vonkajší obal kosti s cievami a nervami. V kostnej dreni sa tvoria tvoje krvné bunky - červená dreň ich produkuje, žltá je tukovou zásobárňou.
💡 Tip na zapamätanie: Šľacha spája sval s kosťou, väz spája kosť s kosťou!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Stavba a funkcie kostry
Tvoja kostra má päť hlavných funkcií, ktoré musíš poznať na skúšku. Dáva telu oporu a tvar, chráni dôležité orgány (lebka mozog, hrudník srdce), slúži ako páky pre svaly, tvorí krvné bunky a skladuje minerály.
Stavba kosti je fascinujúca - okostica zabezpečuje výživu a rast, kompaktná kosť je pevná vonkajšia vrstva, špongiózna kosť má sieťovitú štruktúru vo vnútri. Červená kostná dreň tvorí krvné bunky hlavne v plochých kostiach, žltá dreň je tuková zásoba v dlhých kostiach.
Kosti delíme podľa tvaru na dlhé (stehenná, ramenná), krátke (zápästie), ploché (lebka, lopatka) a nepravidelné (stavce). Pevné spojenia sú švy lebky, pohyblivé spojenia sú kĺby.
💡 Zaujímavosť: Tvoje kosti sa kompletne obnovia každých 7-10 rokov!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Kĺby - pohyblivé spojenia
Kĺby sú miesta, kde sa stretávajú kosti a umožňujú pohyb. Kĺbové plochy sú pokryté hladkou kĺbovou chrupavkou, ktorá znižuje trenie. Kĺbové puzdro uzatvára kĺb a obsahuje synoviálnu tekutinu, ktorá mazáva a vyživuje chrupavku.
Typy kĺbov sa líšia rozsahom pohybu. Guľovitý kĺb (rameno, bedro) umožňuje pohyb vo všetkých smeroch, vajcovitý (zápästie) v dvoch rovinách, valcový (lakeť, koleno) len ohýbanie a naťahovanie. Plochý kĺb má obmedzený posuvný pohyb.
Väzy spevňujú kĺbové puzdro a držia kosti pohromade. Bez nich by sa kĺby vykĺbili pri každom pohybe. Kĺbová dutina je priestor vyplnený synoviou - bez nej by kĺby škrípali ako neolejované pánty.
💡 Praktický tip: Pri športovaní chráň kĺby správnou technikou a rozohriavaním!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Svaly - motorv tela
Svaly sú aktívna časť pohybového aparátu, ktorá vytvára silu na pohyb. Máš tri typy svalov: hladké v orgánoch (neovládaš ich), priečne pruhované na kostiach (ovládaš vôľou) a srdcový (špecifický, rytmicky sa sťahuje).
Kostrové svaly majú svalové bruško (mäsitá časť) a šľachy (pevné konce pripájajúce ku kostiam). Vnútri sú svalové vlákna s kontraktilnými bielkovinami aktín a myozín, ktoré sa po sebe posúvajú pri sťahovaní.
Princíp kontrakcie funguje jednoducho: príde nervový impulz, svalové vlákna sa posúvajú a skracujú, sval sa stiahne. Potrebuješ na to energiu (ATP) a vápnik. Antagonizmus svalov znamená, že pracujú v pároch - ohýbač (biceps) vs naťahovač (triceps).
💡 Zaujímavosť: Tvoje svaly produkujú teplo, preto sa pri zime triaskeš - svaly sa rýchlo sťahujú!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Praktické príklady a zdravie
Keď zdvíhaš knihu, tvoj nervový systém pošle signál, biceps sa stiahne, triceps sa uvoľní, lakťový kĺb sa ohne a predlaktie sa zdvihne. Kosti fungujú ako páky, na ktoré pôsobí svalová sila.
Pri zlomenine sa spustí proces hojenia: vytvorí sa krvná zrazenina, potom mäkký kalus, ktorý sa postupne zmení na kostné tkanivo. Imobilizácia (sadra) a správna výživa sú kľúčové pre hojenie.
Pre zdravú opornú a pohybovú sústavu potrebuješ dostatok vápnika a vitamínu D - vápnik je stavebný materiál, vitamín D pomáha jeho vstrebávanie. Pravidelný pohyb posilňuje svaly a udržiava kosti pevné, pretože reagujú na záťaž.
💡 Tip pre skúšku: Zapamätaj si rozdiely - šľacha spája sval s kosťou, väz spája kosť s kosťou v kĺbe!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
We thought you’d never ask...
What is the Knowunity AI companion?
Our AI Companion is a student-focused AI tool that offers more than just answers. Built on millions of Knowunity resources, it provides relevant information, personalised study plans, quizzes, and content directly in the chat, adapting to your individual learning journey.
Where can I download the Knowunity app?
You can download the app from Google Play Store and Apple App Store.
Is Knowunity really free of charge?
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
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Students love us — and so will you.
4.6/5
App Store
4.7/5
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user