Question

Given below is a highly schematic diagram of the human blood circulatory system.
(a) Which part (state the number) represents the hearts? Give reason ink support of your answer.
(b) Which numbers represent the following respectively?
Aorta Renal vein
Hepatic portal vein Stomach
Pulmonary artery Dorsal aorta
Superior vena 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