Biology
Given below is a highly schematic diagram of the human blood circulatory system.
(a) Which part (state the number) represents the heart? Give reason in support of your answer.
(b) Which numbers represent the following respectively?
Aorta
Hepatic portal vein
Pulmonary artery
Superior vena cava
Renal vein
Stomach
Circulatory System
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Answer
(a) The structure 3 represents the heart. It forms the centre of double circulation and is located between the liver and the head. Also the blood circulation (indicated by 1) begins from heart to lungs.
(b) The numbers of the structures are mentioned below:
- Aorta → 5
- Hepatic portal vein → 7
- Pulmonary artery → 1
- Superior vena cava → 9
- Renal vein → 8
- Stomach → 10
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