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Gas exchange in humans and respiration · Topic 1

Breathing and respiration

Cambridge IGCSE Biology

Characteristics and classification of living organisms

1. Living organisms and classification

Organisation of the organism

1. Cells and organisation

Movement into and out of cells

1. Transport across membranes

Biological molecules and enzymes

1. Molecules and enzymes

Plant nutrition

1. Photosynthesis and leaves

Human nutrition

1. Diet and digestion

Transport in plants

1. Water and sugar transport

Transport in animals and diseases and immunity

1. Circulation and defence

Gas exchange in humans and respiration

1. Breathing and respiration

Excretion in humans

1. Kidneys and excretion

Coordination and response and drugs

1. Control and coordination

Reproduction

1. Reproduction and development

Inheritance and variation and selection

1. Genes and selection

Organisms and their environment, human influences and biotechnology

1. Ecology and biotechnology

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Transport in animals and diseases and immunity, Circulation and defence Excretion in humans, Kidneys and excretion