Unit 3 Organisms exchange substances with their environment

Miss Estruch’s A‑Star AQA Biology Bundle is an exquisitely crafted, fully comprehensive set of notes that aligns precisely with the AQA specification, injecting expert exam‑insight, key terminology and mark‑scheme strategies into every page. It’s not just content — it’s a premium, laser‑focused revision tool that transforms complex biology into crystal‑clear, memorable summaries and practice pathways, elevating students from average to elite. Combine the elegance of clari...

4.7

(3)

41 pages

Written in 2025/2026

farhan67

Summary notes of all specification points in topic.

-

20 pages

Written in 2022/2023

nizarazia

This clear and high-yield study pack provides a comprehensive summary of AQA A-Level Biology Unit 3 (Organisms exchange substances with their environment). Written strictly to align with the latest AQA specification, these notes condense complex pathways and transport mechanics into easily digestible, exam-focused breakdowns designed to help you secure an A grade*. The resource covers every core subsection in maximum detail: surface area to volume ratios, gas exchange across different organisms ...

-

4 pages

Written in 2026/2027

aliceoliviaking

I achieved 3 As at A-level including biology and these were my only source of revision. It cuts the waffle and involves you in active recall with exam questions.

-

17 pages

Written in 2026/2027

ashleyconstable

Comprehensive, high-yield revision guide covering the Cardiac Cycle, Muscle Properties, and Pacemakers—strictly mapped to the current AQA A-Level specifications.Written by an A* student using exact past mark schemes to ensure all critical examiner keywords are included. Stop wasting hours reading dense textbooks; this guide condenses everything you need to know into punchy, easy-to-memorise bullet points, flowcharts, and structural summary tables.What’s included inside this guide: Cardiac...

-

6 pages

Written in 2025/2026

nicolaaswepener

This is an in depth summary of paper 1 in AQA A Level biology: These summaries have been created using the specification so all information is concise and hits mark scheme specific points. My name is Ella, and I achieved an A* in biology (2026) exams using these notes, I was 14 marks above the A* grade boundary. @ella.gradestomed

-

4 items

ellagradestomed

Exam level Questions Designed to Prepare Students for Exams

-

16 pages

Written in 2023/2024

Grade A+

EdwardA

The summary of the third topic in A Level biology: Organisms exchange substances with their environment. This is 3.3 in the AQA specification and consists of: surface area to volume ratio, gas exchange, digestion and absorption, mass transport. This summary has been created using the specification so all information is concise and hits mark scheme specific points. My name is Ella, and I achieved an A* in biology (2026) exams using these notes, I was 14 marks above the A* grade boundary. I ...

-

11 pages

Written in 2026/2027

ellagradestomed

AQA A Level Biology ALL topics summary notes Also includes example exam questions and answers. The AQA A Level Biology specification is integrated into the notes in order to make it easy and accessible for students to prepare for exams. Written by an A* student in 2025.

-

8 items

blueberrypie

AQA A Level Biology Unit 3 - Organisms exchange substances with environment - summary notes Includes: Surface area to volume ratios, gas exchange, digestion and absorption, and mass transport in plants and animals. Also includes example exam questions and answers. The AQA A Level Biology specification is integrated into the notes in order to make it easy and accessible for students to prepare for exams. Written by an A* student in 2025.

-

21 pages

Written in 2024/2025

blueberrypie

Handwritten notes on every topic of AQA Alevel Biology which earnt me a 4 A* prediction and As/A*s in class tests and mocks

-

7 items

eleanordickson

Handwritten notes of every topic of AQA Alevel Biology which earnt me a 4 A* prediction and As/A*s in class tests and mocks

-

20 pages

Written in 2025/2026

eleanordickson

These notes are aesthetic, concise and only contain information present in the specification, to allow for efficient revision. (NOTE: These notes DON'T contain UNIT 8 & HOMEOSTASIS)

-

7 items

NotableNotes

This complete Year 12 AQA A Level Biology revision package covers Units 1–4, following the official AQA specification exactly so every required topic is included. The aesthetic, exam-focused notes make revision simple, efficient, and easy to follow.

-

4 items

NotableNotes

These notes cover the topic of biological molecules for AQA A Level Biology, including key concepts, definitions, and exam-relevant content. The document is useful for revision of core topics such as gas exchange in insects and fish, digestion, mass-flow hypothesis, bohr effect, cardiac cycle.

-

27 pages

Written in 2025/2026

NotableNotes

key topics to learn in A Level Biology, simple summaries to help learn key processes

-

5 items

bhavihalai11

The Quizlet flashcards I used to get an A* in AQA A-Level Biology 2025! Made using a blend of my textbook, class notes and past paper mark schemes has some past paper questions and answers to understand mark scheme points!

-

4 items

ellenwallace

The Quizlet flashcards I used to get an A* in AQA A-Level Biology 2025! Made using a blend of my textbook, class notes and past paper mark schemes has some past paper questions and answers to understand mark scheme points! (Please note that using these does not guarantee you a high grade! Practice questions and other study methods are very important, these flashcards are just what I used to learn and study the content with all the detailed points and core information you need) You wi...

-

1 pages

Written in 2025/2026

ellenwallace

These notes cover all core AQA A-Level Paper 1/ As-Level Biology topics: Biological Molecules, Cells, Exchange Between Organisms and their Environment, Genetic Information, Variation, and Relationships between Organisms. The document explains key concepts such as biological molecules, cell ultrastructure, digestion, gas exchange, variation, etc.

-

4 items

eihuijia

These notes cover AQA A-Level Biology topic “Organisms Exchange Substances with Their Environment,” including surface area to volume ratio, specialised exchange surfaces, gas exchange in insects, fish and mammals, lung structure, breathing mechanisms, digestion, absorption in the ileum, and transport systems in mammals. The document also explains haemoglobin, oxygen dissociation curves, lung diseases, and circulatory system structure. It is structured as detailed revision material aligned wi...

-

22 pages

Written in 2025/2026

eihuijia

These summary note pages provide a clear understanding of the topic, condensing overwhelming information into key and precise marking points. The pages include a variety of visual diagrams and processes in colour to help those who need to see to understand (like me!). You can print and test from or use them as a guide; I hope these pages help!!!

-

18 items

astleyolivia1

This summary note page provides a clear understanding to the topic, condensing overwhelming information from the module book into key and precise marking points. The page includes a variety of visual diagrams and processes in colour to help those who need to see to understand (like me!). You can print and test from or use them as a guide to your own notes too. Hopefully these notes can support you through your final parts of revision, and help to achieve the grades you need (as they did for me ...

-

1 pages

Written in 2024/2025

astleyolivia1