Plasma

RBCs

WBCs

Platelets

Yellow, slightly basic fluid having 90% water, 1% salts, 7% proteins and 2% food materials.

It has further many constitute:

• Protein→Prothrombin and fibrinogen helps in blood clotting and albumin helps in maintaining osmotic pressure of water in plasma.
• Inogenic salts→ Na+, cl- , Ca+ , k+ and many more salts are present in cells.
• Food material→ They are glucose, amino acids, fatty acids and triglycerides
• Waste materials→ urea, uric acid and ammonia.
• Anticoagulant→ heparin is present in plasma which prevents the formation of clot inside a blood vessel, to prevent blockage.

Also called erythrocytes.

• They are red due to the presence of red colored pigment, hemoglobin in them.
• Formation of RBCs is called erythropoies-is. They are formed in spleen in fetus and in red bone marrow in adult. They get digested in spleen and liver.
• Transport oxygen an small amount of carbondioxide.
• And survive for 120 days.

Also called leucocytes.

They have no such pigment so appear colorless.

• Formation of WBCs is called leucopoiesis.

• Formed in spleen, lymph nodes, thymus and red bone marrow.
•  It is further of two types: 1.(Agranulocyte) is further of three types→ basophils, neutrephills and eosinophills. 2.(Granulocytes)is further of two types→ monocytes and
• lymphocytes. Act as soldiers, protectors, builders of body.  Provide immunity to body and also protect from toxicants in body.
• Survive for 3-4 days.

Also called thrombocytes.

They too don’t have any pigment.

• The formation of platelets is called thrombop-oiesis.
• They are formed in red bone marrow and destroyed in blood itself.
• Help in blood clotting.
• Survive for 3-7 days.