The Circulatory System

  • Question

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

    Study the same and answer the questions which 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?

    (v) Draw a diagram of the different blood cells as seen in a smear of human blood.


    1-Superior vena cava


    ii. Function of blood vessel 5 (Hepatic artery) - It supplies oxygenated blood to the liver.

    Function of blood vessel 8 (Inferior vena cava) - It carries deoxygenated blood from the posterior parts of the body to the heart

    iii. Importance of blood vessel 6 (Hepatic portal vein) - It carries nutrient rich blood from the gastrointestinal tract to the liver.

    iv Hepatic portal vein.

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