Subjects
Careers
Maths
Chemistry
Biology
English Lang.
History
Energy transfers (a2 only)
Infection and response
Homeostasis and response
Responding to change (a2 only)
Cell biology
Biological molecules
Organisation
Substance exchange
The control of gene expression (a2 only)
Bioenergetics
Genetic information & variation
Inheritance, variation and evolution
Genetics & ecosystems (a2 only)
Ecology
Cells
Show all topics
2m wars and welfare: britain in transition, 1906-1957
World war two & the holocaust
2o democracy and nazism: germany, 1918-1945
1f industrialisation and the people: britain, c1783-1885
Medieval period: 1066 -1509
1l the quest for political stability: germany, 1871-1991
Britain & the wider world: 1745 -1901
2d religious conflict and the church in england, c1529-c1570
The cold war
1c the tudors: england, 1485-1603
Inter-war germany
2n revolution and dictatorship: russia, 1917-1953
2s the making of modern britain, 1951-2007
World war one
Britain: 1509 -1745
Show all topics
18
0
Leia ๐ซง
01/05/2023
Biology
Circulatory system: the heart
The circulatory system is a vital network comprising the heart, blood vessels, and blood, working together to distribute oxygen and nutrients throughout the body. The heart, a muscular organ with four chambers, plays a central role in pumping blood through the body's intricate network of blood vessels. This system is essential for maintaining life and health.
01/05/2023
650
The journey of blood through the body is a complex process that involves multiple steps and relies on the coordinated function of various parts of the circulatory system.
Highlight: The blood flow through the heart | step by step involves a specific sequence: body tissues โ vena cava โ right atrium โ right ventricle โ pulmonary artery โ lungs โ pulmonary vein โ left atrium โ left ventricle โ aorta โ body tissues.
This process ensures that deoxygenated blood from the body is sent to the lungs to pick up oxygen, and then oxygenated blood is distributed to the rest of the body.
The heart's rhythmic contractions are controlled by special cells called pacemaker cells. These cells are crucial for maintaining a regular heartbeat.
Definition: Pacemaker cells of the heart are specialized cells that produce small electrical impulses, causing the heart muscles to contract.
If these natural pacemaker cells fail to function properly, doctors may need to implant an artificial pacemaker to regulate the heart's rhythm.
Example: An artificial pacemaker is a small electronic device implanted in the chest to help control the heart's rhythm when the natural pacemaker cells are not working correctly.
The contraction of the heart's chambers follows a specific pattern:
Highlight: The chamber within the heart that is responsible for pumping oxygen depleted blood to the lungs is the right ventricle.
Lastly, it's important to note that the heart muscle itself needs a blood supply. This is provided by the coronary arteries, which supply the heart muscle with oxygen and nutrients essential for its continuous function.
926
7940
10/11
The Heart
GCSE AQA Specific. The Heart - AQA Biology. Please do not repost this without my permission! Much love <3
15
439
10/11
Circulatory System
Learn about the alternation of contractions and relaxation of the heart, as well as the factors affecting heart rate and risk factors for coronary heart disease.
12
511
10/11
The heart + circulatory system IGCSE BIOLOGY
Useful visuals on how blood travels through the heart, use them as posters or just notes. This helped me get 9s
11
765
10/11
Notes on the Heart
biology notes for the heart, gcse science
16
1254
10/11
The circulatory system -B1
The circulatory system for biology paper 1 (foundation) AQA
1717
9218
11
AQA Biology Revision - The Heart
AQA GCSE Biology - The heart and blood vessels revision.
Average app rating
Pupils love Knowunity
In education app charts in 17 countries
Students have uploaded notes
iOS User
Philip, iOS User
Lena, iOS user
Leia ๐ซง
@aleyahafsa
The circulatory system is a vital network comprising the heart, blood vessels, and blood, working together to distribute oxygen and nutrients throughout the body. The heart, a muscular organ with four chambers, plays a central role in pumping blood through... Show more
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
The journey of blood through the body is a complex process that involves multiple steps and relies on the coordinated function of various parts of the circulatory system.
Highlight: The blood flow through the heart | step by step involves a specific sequence: body tissues โ vena cava โ right atrium โ right ventricle โ pulmonary artery โ lungs โ pulmonary vein โ left atrium โ left ventricle โ aorta โ body tissues.
This process ensures that deoxygenated blood from the body is sent to the lungs to pick up oxygen, and then oxygenated blood is distributed to the rest of the body.
The heart's rhythmic contractions are controlled by special cells called pacemaker cells. These cells are crucial for maintaining a regular heartbeat.
Definition: Pacemaker cells of the heart are specialized cells that produce small electrical impulses, causing the heart muscles to contract.
If these natural pacemaker cells fail to function properly, doctors may need to implant an artificial pacemaker to regulate the heart's rhythm.
Example: An artificial pacemaker is a small electronic device implanted in the chest to help control the heart's rhythm when the natural pacemaker cells are not working correctly.
The contraction of the heart's chambers follows a specific pattern:
Highlight: The chamber within the heart that is responsible for pumping oxygen depleted blood to the lungs is the right ventricle.
Lastly, it's important to note that the heart muscle itself needs a blood supply. This is provided by the coronary arteries, which supply the heart muscle with oxygen and nutrients essential for its continuous function.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
The heart is a complex organ with four chambers that work in harmony to pump blood throughout the body. Its structure and function are crucial for understanding the circulatory system.
Highlight: The heart has four chambers: right atrium, right ventricle, left atrium, and left ventricle.
The heart's chambers are connected to major blood vessels that carry blood to and from different parts of the body. These vessels include:
Vocabulary: Deoxygenated blood is blood that has low oxygen content, while oxygenated blood is rich in oxygen.
The heart's structure also includes valves that prevent blood from flowing backward between chambers. This ensures that blood flows in the correct direction through the heart and to the rest of the body.
Definition: Valves are structures in the heart that open and close to control the direction of blood flow.
App Store
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 itโs 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 didnโt even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as Iโm sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH ๐๐๐ฒ๐ค๐โจ๐๐ฎ
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 itโs 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 didnโt even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as Iโm sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH ๐๐๐ฒ๐ค๐โจ๐๐ฎ
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
