To prevent coagulation,blood stored in a blood bank contains a small amount of:

Thrombocytes are essential for coagulation of blood. Comment.

Which of the following couples would a doctor advise not to have more than one child?

In which of the following aspects does serum differ from blood?

Identify the cells and their functions based on the provided figure:
$(a)$ Fig. $A$ - Megakaryocyte - formation of platelets
$(b)$ Fig. $B$ - Lymphocyte - synthesis of antibodies
$(c)$ Fig. $A$ - Eosinophil - secrete antihistamine
$(d)$ Fig. $A$ - Neutrophil - secrete heparin

Average life span of human $RBC$ is