Biology Lessons

KS3 Biology

Contents

Topic 1 - Cells and Respiration

Topic 2 - Humans as Organisms

Topic 3 - Plants and Ecosystems

Topic 4 - Inheritance, Variation, and Survival

Topic 1 - Cells and Respiration

1.1 - The Microscope

1.2 - Animal and Plant Cells

1.3 - Unicellular Organisms

1.4 - Cell Organisation

1.5 - Diffusion

1.6 - Respiration

Topic 2 - Humans as Organisms

2.1 - Nutrition

2.2 - Nutrition and Energy

2.3 - The Digestive System

2.4 - Absorption

2.5 - The Skeletal System

2.6 - The Muscular System

2.7 - Calculating Muscle Force

2.8 - Gas Exchange

2.9 - Breathing

2.10 - Exercise, Smoking, and Asthma

2.11 - Drugs

Topic 3 - Plants and Ecosystems

3.1 - Plant Nutrition

3.2 - Plant Reproduction

3.3 - Fertilisation, Seed Formation and Dispersal

3.4 - Investigating Seed Dispersal

3.5 - Dependence on Other Organisms

3.6 - Food Chains

3.7 - Food Webs

Topic 4 - Inheritance, Variation, and Survival

4.1 - The Human Reproductive System

4.2 - The Menstrual Cycle

4.3 - Fertilisation, Development, and Gestation

4.4 - Health, Pregnancy, and Birth

4.5 - DNA and Inheritance

4.6 - Variation

4.7 - Natural Selection

4.8 - Extinction and Preserving Species