Q4 of 95 Page 83

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

Yes, it is possible for the blood to clot under the skin. Sometimes due to a sharp pinch by any object, the blood may clot under the skin. In this, the skin does not break but one or more fine capillaries lying under the skin are injured & the escaped blood forms a clot under the skin.


More from this chapter

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2

What are the main steps in coagulation of blood?

 3

What are the following?

(a) Rh factor


(b) Universal donor


(c) Diapedesis

 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.