1. Link the systems

WALT: Explain how oxygen is transported to cells for aerobic respiration.

Success criteria: I can link breathing, the circulatory system, cells and energy release.

Complete the diagram. Add the missing key words: oxygen and ATP.

Breathing in ____________

↓

Circulatory transport

↓

Cells use ____________ in respiration

2. Inputs and outputs of respiration

Complete the table by placing each word in the correct column.

Inputs

________________

Outputs

________________

Word bank: O₂ glucose CO₂ water energy/ATP

3. During exercise, what changes in the body’s needs? Explain how oxygen is delivered to cells. Write 2–3 sentences.

Word bank: oxygen glucose carbon dioxide water ATP transport cells energy exercise

4. Challenge: Compare a rest state with an exercise state in terms of oxygen demand and energy use. Add one extra link sentence.

Support: Say your answer aloud to a partner first. Use the word bank and underline oxygen, transport and ATP.

Extension: Include the reason that active cells need more energy.