Q3 of 95 Page 94

Name the following:

The fluid found between the membranes of the heart.

Pericardial fluid

Explanation - Heart is surrounded by three layers of cardiac muscles called endocardium (innermost layer), myocardium (middle layer) & epicardium (outer most layer) . The space between the three layers is filled with a gelatinous fluid called pericardial fluid. This fluid reduces the chances of friction & tear between the layers).


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3

Name the following:

The valve present in between the chambers on the right side of the human heart.

 3

Name the following:

The phase of the cardiac cycle in which the ventricles get filled with blood from the atrium.

 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).