9.Given below are certain structures, write their chief functional activity.(a) Blood platelets………….(b) Neutrophils ……………..(c) Erythrocytes ……………..(d) Lymphocytes …………….(e) Bone marrow ………….

Solution :

(a)Blood platelets : blood coagulation
(b) Neutrophils : phagocytosis
(c) Erythrocytes : transportation of gases
(d) Lymphocytes : antibodies production
(e) Bone marrow : destruction of old and weak red blood cells