Q5 of 95 Page 83

State any five functions of the blood.

Five functions of blood are :

a) Transport of digested food from the alimentary canal to the tissues.

b) Transport of oxygen from the lungs to the tissues.

c) Transport of carbon dioxide from the tissues to lungs.

d) Transport of excretory material from the tissues to the liver, kidney or skin for elimination.

e) Blood distributes the hormones secreted by endocrine glands directly into the blood.

What are the following?

(a) Rh factor

(b) Universal donor

Is it possible for the blood to clot under the skin? Give reason in support of your answer.

Given below is a diagram of a smear of human blood. Study 4 the same and answer the questions that follow:

(a) Name the parts 1, 2, 3 and 4 indicated by guidelines.

(b) Mention two structural differences between the parts labelled ' 1' and '2'.

(d) What is the lifespan of the part labelled '1'?

(e) Name a soluble protein found in '4' which helps in the clotting of blood.

Fill in the blanks:

(i) Ventricles have …………………………walls when compared with those of auricles.

(ii) Ventricles give rise to two large blood vessels called ……………………and …………………………

Questions · 95

7. The Circulatory System

1 2 3 4 1 1 1 1 2 1 2 2 2 2 1 2 1 2 2 1 2 3 4 1 2 3 4 5 1 1 2 3 1 2 1 1 2 3 1 2 3 4 5 6 1 2 3 4 5 6 7 1 2 3 3 3 3 3 3 3 3 3 3 4 5 6 7 1 2 3 4 5 6 1 1 1 1 2 3 4 5 5 5 5 5 5 1 2 3 4 5 6 7 8 9