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4 Dec 2025
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Exploring GCSE History: Key Advances in Medicine
CJ๐ค
@gcseandalevelnotesforyou_
The Three Deadly Problems of 1800s Surgery
Surgery before the 1800s was absolutely terrifying because surgeons couldn't solve three major issues. Pain meant patients were fully conscious during operations, infection killed many people after surgery, and blood loss made longer operations impossible.
The breakthrough with pain came from several key figures experimenting with different substances. Humphrey Davy discovered that nitrous oxide (laughing gas) worked as a local anaesthetic in 1799, though it didn't catch on until after his death. William Morton then experimented with ether, which became widely used despite being flammable and making patients feel sick afterwards.
James Simpson's discovery of chloroform changed everything in the early 1800s. This anaesthetic was more effective than ether and became the most widely used option. Because patients stayed still and felt no pain, surgeons could finally attempt more complex operations.
Key Insight: The Church initially opposed anaesthetics, arguing that pain in childbirth was God's will, but John Snow's chloroform inhaler in the 1850s made the process much safer by mixing water and chloroform.
Meanwhile, the fight against disease was just beginning. Louis Pasteur, a French chemist, noticed bacteria made wine go off and conducted clever experiments with heated broth in flasks. His Germ Theory, published in 1861, proved that microbes in the air caused disease - a revolutionary idea that paved the way for vaccines, better surgery, and antibiotics.
Fighting Germs and Making Surgery Safer
Robert Koch, a German doctor, took Pasteur's work further by using industrial dyes to stain bacteria under microscopes. He discovered the specific germ causing anthrax - the first time anyone had identified which bacteria caused a particular disease. Though Pasteur and Koch were rivals, their combined work transformed medicine forever.
Joseph Lister read about Pasteur's Germ Theory and realised he could apply it to surgery. This Scottish surgeon discovered that carbolic acid prevented infection when soaked onto bandages before applying them to wounds. His carbolic acid spray sterilised the air in operating rooms, making surgery much safer and dramatically reducing death rates.
However, not everyone was convinced. Some surgeons complained that carbolic acid irritated their eyes and hands, making delicate surgery difficult. Henry Bastian argued against Germ Theory, believing in "spontaneous generation" - the idea that germs were symptoms, not causes of disease.
Game Changer: An American surgeon introduced rubber gloves to reduce carbolic acid irritation, leading to aseptic surgery where sterilised equipment and hands eliminated the need for harsh sprays.
The final piece of the puzzle came in 1901 when Karl Landsteiner discovered blood groups. This breakthrough meant blood transfusions could be performed successfully, making longer operations safer and solving the deadly problem of blood loss that had plagued surgeons for centuries.
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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
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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
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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!
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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
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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
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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
Exploring GCSE History: Key Advances in Medicine
CJ๐ค
@gcseandalevelnotesforyou_
Surgery in the 1800s was basically a nightmare - imagine having an operation whilst fully awake, with dirty instruments, and potentially bleeding to death! Thankfully, some brilliant scientists and doctors revolutionised medicine by tackling these three deadly problems: pain, infection,... Show more
The Three Deadly Problems of 1800s Surgery
Surgery before the 1800s was absolutely terrifying because surgeons couldn't solve three major issues. Pain meant patients were fully conscious during operations, infection killed many people after surgery, and blood loss made longer operations impossible.
The breakthrough with pain came from several key figures experimenting with different substances. Humphrey Davy discovered that nitrous oxide (laughing gas) worked as a local anaesthetic in 1799, though it didn't catch on until after his death. William Morton then experimented with ether, which became widely used despite being flammable and making patients feel sick afterwards.
James Simpson's discovery of chloroform changed everything in the early 1800s. This anaesthetic was more effective than ether and became the most widely used option. Because patients stayed still and felt no pain, surgeons could finally attempt more complex operations.
Key Insight: The Church initially opposed anaesthetics, arguing that pain in childbirth was God's will, but John Snow's chloroform inhaler in the 1850s made the process much safer by mixing water and chloroform.
Meanwhile, the fight against disease was just beginning. Louis Pasteur, a French chemist, noticed bacteria made wine go off and conducted clever experiments with heated broth in flasks. His Germ Theory, published in 1861, proved that microbes in the air caused disease - a revolutionary idea that paved the way for vaccines, better surgery, and antibiotics.
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Fighting Germs and Making Surgery Safer
Robert Koch, a German doctor, took Pasteur's work further by using industrial dyes to stain bacteria under microscopes. He discovered the specific germ causing anthrax - the first time anyone had identified which bacteria caused a particular disease. Though Pasteur and Koch were rivals, their combined work transformed medicine forever.
Joseph Lister read about Pasteur's Germ Theory and realised he could apply it to surgery. This Scottish surgeon discovered that carbolic acid prevented infection when soaked onto bandages before applying them to wounds. His carbolic acid spray sterilised the air in operating rooms, making surgery much safer and dramatically reducing death rates.
However, not everyone was convinced. Some surgeons complained that carbolic acid irritated their eyes and hands, making delicate surgery difficult. Henry Bastian argued against Germ Theory, believing in "spontaneous generation" - the idea that germs were symptoms, not causes of disease.
Game Changer: An American surgeon introduced rubber gloves to reduce carbolic acid irritation, leading to aseptic surgery where sterilised equipment and hands eliminated the need for harsh sprays.
The final piece of the puzzle came in 1901 when Karl Landsteiner discovered blood groups. This breakthrough meant blood transfusions could be performed successfully, making longer operations safer and solving the deadly problem of blood loss that had plagued surgeons for centuries.
We thought youโd 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?
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Most popular content: Public Health Evolution
Most popular content in History
Most popular content
English - inspector calls quotes and analysis
Quotes from every main character
English Literature10
Can't find what you're looking for? Explore other subjects.
Students love us โ and so will you.
4.9/5
App Store
4.8/5
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 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