Question

The diagram below represents the simplified pathway of the circulation of blood. Study the same and answer the questions that follow :

(i) Name the blood vessels labelled 1 and 2. 

(ii) State the function of blood vessels labelled 5 and 8. 

(iii) What is the importance of the blood vessel labelled 6 ? 

(iv) Which blood vessel will contain a high amount of glucose and amino acids after a meal ? 

Answer 1

(i) (1) Anterior/Superior venacava (2) Dorsal aorta 

(ii) Function of 5: Supply oxygenated blood to liver. 

Function of 8: Cajry deoxygenated blood from posterior parts of the body to the right auricle of heart. 

(iii) Importance of the blood vessel labelled 6: Blood vessel 6 is called Hepatic portal vein. It carries deoxygenated blood from intestine to liver. This blood contains excess glucose, some toxic substances etc. which are sent to liver where they are detoxified and the excess glucose is converted to glycogen and stored. This prevents these substances from directly entering the heart and damaging the heart. 

(iv) Blood Vessel-6