PDF chapter test TRY NOW
Identify the organ according to the function and choose the answer correctly:
1. 
The diagram shows a human digestive system. Which numbered organ among the following secretes gastric juice that digests protein?
2. 
The diagram shows the flow of blood in the heart. Which labelled part carries deoxygenated blood from body to heart?
3. 
The diagram shows the process of breathing. In which of the following process does the volume of the thoracic cavity decrease?
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