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BiologyBiology360 views·Updated Jun 2, 2026·2 pages

exchanging substances

user profile picture
v🤍@veronicaspiewakx

biology topic b1 - cell biology exchanging substances

1
of 2
# Gas exchange
☆ happens in the
lungs.

The job
of the lungs is
to transfer oxygen to the blood
and to remove waste carbon dioxide from it.
2
of 2
# Gas exchange
☆ happens in the
lungs.

The job
of the lungs is
to transfer oxygen to the blood
and to remove waste carbon dioxide from it.

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?

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AnnaiOS user

BiologyBiology360 views·Updated Jun 2, 2026·2 pages

exchanging substances

user profile picture
v🤍@veronicaspiewakx

biology topic b1 - cell biology exchanging substances

1
of 2
# Gas exchange
☆ happens in the
lungs.

The job
of the lungs is
to transfer oxygen to the blood
and to remove waste carbon dioxide from it.

Sign up to see the content. It's free!

  • Access to all documents
  • Improve your grades
  • Join milions of students
2
of 2
# Gas exchange
☆ happens in the
lungs.

The job
of the lungs is
to transfer oxygen to the blood
and to remove waste carbon dioxide from it.

Sign up to see the content. It'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.

Similar content

Most popular content: Substance Exchange in Organisms

7
BiologyBiology

Biology Paper 1 Overview

Explore essential concepts for Biology Paper 1, including eukaryotic and prokaryotic cell structures, mitosis, enzyme functions, and the human circulatory and digestive systems. This comprehensive summary is perfect for exam preparation and understanding key biological processes.

101,32915
BiologyBiology

Gas Exchange Mechanisms

Explore the diverse gas exchange systems in multicellular and unicellular organisms. This summary covers specialized exchange surfaces, including gills, lungs, and stomata, highlighting their structures and functions. Understand the principles of diffusion, concentration gradients, and the adaptations that facilitate efficient gas exchange in various environments. Ideal for A Level Biology students studying respiratory systems.

122203
BiologyBiology

Gas Exchange Systems Overview

Explore the gas exchange systems of insects, bony fish, and mammals in this comprehensive AS and A-Level Biology summary. Understand key concepts such as diffusion, alveoli, gill arches, and the tracheal system. This resource highlights the importance of specialized exchange surfaces and the surface area-to-volume ratio in efficient respiration. Perfect for exam preparation and quick revision.

1255221
BiologyBiology

Insect Gas Exchange Mechanisms

Explore the intricate gas exchange systems in insects, focusing on the role of spiracles, tracheae, and tracheoles. This summary covers adaptations for efficient oxygen delivery and carbon dioxide removal, including the Discontinuous Gas Exchange Cycle and mechanical ventilation strategies. Ideal for biology students studying respiratory systems.

122317
BiologyBiology

GCSE Biology QER Insights

Explore comprehensive insights into 6-mark QER questions for the WJEC Biology GCSE. This resource covers key topics such as substance exchange, the carbon and nitrogen cycles, respiration, and the circulatory system, providing essential knowledge for exam preparation.

1084117
BiologyBiology

Fish Gas Exchange Mechanisms

Explore the intricate mechanisms of gas exchange in fish, focusing on the structure and function of gills, including the role of buccal cavity and operculum during inspiration and expiration. This summary covers key concepts such as the countercurrent exchange system and the importance of maximizing surface area for efficient oxygen absorption. Ideal for students studying biology and marine life.

12560
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Explore the essential mechanisms of gas exchange in plants and animals, including stomata function, leaf anatomy, fish respiration, and the role of specialized respiratory surfaces. This summary covers key concepts such as photosynthesis, respiration, and the importance of surface area-to-volume ratios, tailored for A Level biology students following the EDUQAS specification.

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12102,8013,040
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Sociology of Families: Comprehensive Revision

Dive into an extensive overview of family dynamics, perspectives, and patterns in sociology. This resource covers key concepts such as family diversity, gender roles, marriage, and the impact of social policies on family structures. Perfect for A-Level Sociology students preparing for Paper 2.

1273,5512,306
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1254,8511,059
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Explore an extensive revision of crime and deviance topics, including theories, types of crime, and the impact of media. This resource covers key concepts such as Marxism, functionalism, gender and crime, and the influence of globalization on criminal behavior. Ideal for students seeking a thorough understanding of criminology and its various theories. Type: Full Topic Revision.

1251,6291,399
English LiteratureEnglish Literature

An Inspector Calls: Character Insights

Explore in-depth analysis and key quotes for characters in J.B. Priestley's 'An Inspector Calls'. This resource covers Gerald Croft, Inspector Goole, Sheila Birling, Mrs. Birling, Eric Birling, and Eva Smith, focusing on themes of class, gender roles, and social responsibility. Ideal for students aiming for Grade 8 and above.

1025,410907
CriminologyCriminology

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Criminology unit 4 detailed revision note

127,144124
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BiologyBiology

Cell Biology and Cell structure

cell structures

93,1770
CriminologyCriminology

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Explore key criminology theories and their implications on crime and deviance. This comprehensive summary covers biological, psychological, and sociological perspectives, including labelling theory, right realism, and the impact of social campaigns on policy development. Ideal for A-Level criminology students seeking to understand the complexities of criminal behaviour and the factors influencing crime prevention strategies.

129,753210
English LiteratureEnglish Literature

Romeo and Juliet: Key themes

Key Romeo and Juliet themes and analysed quotes

106,695198

Can't find what you're looking for? Explore other subjects.

Students love us — and so will you.

4.6/5App Store
4.7/5Google 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 SiOS 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 KlichAndroid 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.

AnnaiOS user