🎯 WALT: We Are Learning To understand how our digestive and respiratory systems work together

Success Criteria: I can explain the journey of food and air through my body, identify key organs, and describe gas exchange.

Part 1: System Knowledge

1. Put the digestive process in the correct order by numbering 1-5:

____ Food is broken down by stomach acid

____ Nutrients are absorbed in the small intestine

____ Food is chewed and mixed with saliva

____ Waste is stored in the large intestine

____ Food travels down the oesophagus

2. Which statement about gas exchange is correct?

Oxygen enters the blood in the heart

Carbon dioxide is absorbed by the lungs

Gas exchange occurs in tiny air sacs called alveoli

The diaphragm filters air before it reaches the lungs

3. Match each organ to its main function:

Liver

Diaphragm

Small intestine

Trachea

Muscle that helps with breathing

Produces bile to break down fats

Windpipe that carries air to lungs

Main site of nutrient absorption

Part 2: System Interactions

4. Explain why we need both digestive and respiratory systems to get energy. Use the words: oxygen, nutrients, cells, energy.

5. Complete the sentences about breathing:

When you breathe IN, your diaphragm moves __________ and your lungs __________. When you breathe OUT, your diaphragm moves __________ and pushes __________ out of your lungs.

6. A student says "The stomach does all the work in digestion." Explain why this statement is incorrect, giving two examples of other organs that help with digestion.

Part 3: Applied Understanding

7. Design an investigation: How could you measure the effect of exercise on breathing rate? Write your method in 3 steps.

8. Extension Challenge: Research and explain one way that the digestive system and respiratory system are connected (hint: think about what happens when you choke).

Differentiation Support: Use your textbook pages 45-52 or ask a partner to help explain any difficult concepts. Focus on questions 1-6 first, then attempt the extension if you have time.