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رد: studying biology with الهوجاس خاص لـ nurses
اقتباس:
53 ------------------ is a specific blood cell that secretes antibodies.
a. a monocyte
b. a neutrophil
c. a lymphocyte
d. an eusinophil
54. The valve which prevents the backward flow of the blood from left ventricle to left atrium is called:
a. bicuspid valve
b. mitral valve
c. atrio-ventricular valve
d. all are correct
87. T F A pericardium is a double fold membrane which encloses the human heart
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ماادري وش اجوبتهم؟؟
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