The diagram below represents the simplified pathway of the circulation of blood. Study the same and answer the question that follow:
(a) Name the blood vessels labelled 1 and 2.
(b) State function of blood vessels labelled 5 and 8
(c) What is the importance of the blood vessel labelled 6?
(d) Which blood vessel will contain a high amount of glucose and amino acids after a meal?
(e) Draw a diagram of the different blood cells as seen in a smear of human blood.

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Solution

(a) (1) Anterior vena cava.
(2) Aorta
(b) (5) Carries oxygenated blood to the liver.
(8) Brings deoxygenated blood from lower parts of the body to the heart.
(c) It brings all the digested food and deoxygenated blood from parts of the alimentary canal to the liver.
(d) Blood vessel number 6.
(e)

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