Q6 of 95 Page 94

Note the relationship between the first two words and suggest the suitable word/words for the fourth place:

(a) Lubb : Atrioventricular valves :: Dup : ………………………………..


(b) Coronary artery : Heart :: Hepatic artery: ………………..

(a) Lubb : Atrioventricular valves :: Dup : semilunar valves


Explanation: The semilunar valves are present at the junction between a) right ventricle and pulmonary artery & b)left ventricle and aorta. During auricular systole , semilunar valves close with a jerk producing a sound called DUP.


(b) Coronary artery : Heart :: Hepatic artery: liver


Explanation: Artery is a blood vessel which carried blood away from the heart. An artery associated with liver is named as hepatic artery.


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4

State the chief functional activity of each of the following:

(a) Blood platelets _____________


(b) Neutrophils _____________


(c) Erythrocytes _____________


(d) Lymphocytes _____________


(e) Bone marrow _____________

 5

Complete the following statements by filling in the blanks from the choices given in the brackets.

(a) The blood vessel that begins and ends in capillaries is the ………………… (hepatic artery, hepatic portal vein, hepatic vein).


(b) A blood vessel which has small lumen and thick wall is …………. (capillary, lymphatic duct, artery, venule)


(c) The valve which prevents back flow of blood in the veins and lymph vessels…… (mitral valve, tricuspid valve, semilunar valve).

 7

Give a reason, why a matured mammalian erythrocyte lacks nucleus and mitochondria?

 1

What does the term "double circulation" mean?