Question

The life span of human granulocytic WBC is approximate –
A. Between 2 to three months
B. More than four-month
C. Less than ten days
D. Between thirteen to twenty days

Answer 1

Hint: WBC is parted to granulocytes and agranulocytes. Granulocytes include neutrophils, eosinophils, basophils. Agranulocytes include lymphocytes and monocytes.

Complete answer:
The lifespan of the WBC is considered to be less than ten days. The cells are then destroyed in the lymphatic system after phagocytosis. Neutrophils are considered to be the most abundant cells of the WBC while basophils are considered to be the least number of cells in the WBC.
On observing the other options-
RBCs generally have a lifespan of two to three months. They get destroyed in the spleen after the completion of their lifespan. Spleen is known to be the graveyard of the RBC.
WBC does not have a lifespan of more than four months. After phagocytosis or engulfing of the foreign particles that entered the cell, the cell gets destroyed and dumped in the lymphatic system.
Thrombocytes have a lifespan of 7 to 10 days after which they get destroyed.
So, option C is the correct answer.

Note:
Blood is classified as RBC, WBC, blood platelets. RBC is the red blood cells of the body which are manufactured in the bone marrow while destroyed in the spleen. WBC is the white blood cells of the body which help in phagocytosis, protect the body from an allergic reaction, secretes hormones like serotonin, histamine, heparin which are considered to be anti-inflammatory hormones. Platelets are the thrombocytes that are produced in the megakaryocytes which help in the clotting or coagulation of the blood.