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प्रश्न
Describe the composition of blood.
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उत्तर
Blood is a fluid connective tissue. In blood, cells move in a medium called blood plasma.
It is composed of following three types of blood cells:
- RBCs (red blood corpuscles) or erythrocytes.
- WBCs (white blood cells) or leucocytes.
- Platelets.
RBCs and WBCs are living, while plasma and platelets are non-living. Blood plasma is a complex fluid consisting of inorganic salts and organic compounds. Albumins, globulins, fibrinogen, glucose, amino acids, lipids, enzymes, hormones, and waste materials are the organic substance of plasma.
WBCs consist of phagocytes (granulocytes and agranular leucocytes) and immunocytes.
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