Q1 of 95 Page 87

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 …………………………

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


Explanation: The ventricles have thick muscular walls because they have to pump blood too long distances.


(ii) Ventricles give rise to two large blood vessels called pulmonary artery and aorta.


Explanation: Ventricles give rise to two large blood vessels called pulmonary artery and aorta. Pulmonary artery, carrying deoxygenated blood, arises from the right ventricle and aorta arises from the left ventricle and carries oxygenated blood.


More from this chapter

All 95 →
5

State any five functions of the blood.

 1

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'.


(c) What is the main function of the parts labelled 1, 2 and 3 respectively ?


(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.

 2

Where are the following located?

(i) Tricuspid valve


(ii) Mitral valve


(iii) Pulmonary semilunar valves

 3

Can you answer why the pulmonary artery shown in Fig. 7.6 is blue in colour?