This document summarizes the three main types of blood cells: red blood cells, white blood cells, and platelets. Red blood cells constitute 40-45% of blood, are disc-shaped and red in color due to hemoglobin, lack a nucleus, and function to transport respiratory gases. White blood cells constitute 1% of blood, are colorless and nucleated, and function in immunity. Platelets are colorless, lack a nucleus, and function in blood clotting. The document compares characteristics of red and white blood cells and provides details on composition, shape, development, lifespan and function of each blood cell type.
9. WHITE BLOOD CELL/LEUCOCYTES
CONSTITUTE 1% OF TOTAL BLOOD
COLOUR LESS
WBC HAVE NUCLEUS
SHAPE LESS
COUNT : 5000-10000
DEVELOP IN THE BONE MARROW
LIFE SPAN : 5-21 DAYS
FUNCTION: IMMUNITY
10. DIFFERENCE BETWEEN RBC & WBC
RBC
1. DO NOT HAVE
NUCLEUS
2. POSSESS
HEMOGLOBIN
3. HELP IN
TRANSPORT OF
RESPIRATORY
GASES
4. LIFE SPAN 120 DAYS
WBC
1. HAVE LARGE NUCLEUS
2. COLOUR LESS
3. HELP IN DEFENCE
MECHANISM
4. LIFE SPAN 5-21 DAYS
