Question

Given below is a highly schematic diagram of the human blood circulatory sytem.

(a) which part (state the number) represents the heart? Give reason in support of your answer.

(b) Which numbers represent the following respectively?

Aorta

Renal Vein

Hepatic portal vein

Pulmonary artery

Stomach

Dorsal aorta

Superior vene cava

Answer 1

(a) The structure 3 represents the heart. It forms the centre of double circulation and is located between the liver and the head (as per the diagram). Also the blood circulation (indicated by 1) begins from heart to lungs.

(b) 

Aorta	5
Hepatic portal vein	7
Pulmonary artery	1
Superior vena cava	9
Renal vein	8
Stomach	10
Dorsal aorta	11