Question

The diagram given below represents the simplified pathway of the circulation of blood. ​

Answer the questions that follow: ​

1. Name the blood vessels labelled 1 to 4. ​

2. Which blood vessel supplies oxygenated blood to the muscles of the heart? ​

3. What is the importance of the blood vessel labelled 5? ​

4. What is the type of blood circulation that takes place between the heart and the lungs? ​

5. Draw a diagram of the different blood cells as seen in a smear of human blood.​

​ [5 Marks]

Answer 1

i. The blood vessels labelled 1 to 4 are:
1 – Superior/Anterior vena cava
2 – Aorta
3 – Pulmonary artery
4 – Pulmonary vein
[1 Mark]
ii. Coronary artery supplies oxygenated blood to the muscles of the heart.
[1 Mark]
iii. The blood vessel labelled 5 is the hepatic portal vein. The hepatic portal vein brings deoxygenated blood from the small intestine to the liver along with the absorbed nutrients from the digestive tract.
[1 Mark]
iv. The blood circulation that takes place between the heart and the lungs is called pulmonary circulation.
[1 Mark]
v.
[1 Mark]