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List the functions of the components of blood? OR Explain the composition of blood.
Functions of the components of blood:
Composition of Blood | ||||
Cell Types
| Description | Average Number present major | Major Function/seeded | |
Red Blood Cells (Erythrocytes) | Like a biconcave disc, without a nucleus, contain hemoglobin. Sum in dm | 15,000,000 per mm3 | Transport Oxygen and a small amount of CO2 | |
White Blood Cells (Leukocytes) |
| 17500 per mm3 | Body's defense | |
Granulocytes
| i- Neutrophils | About twice the size of RBCs, nucleus 3-5 lobed | 62% of WBCs | Destroy small particles by phagocytosis |
ii- Eosinophils | About twice the size of RBCs; nucleus bilobed | 2% of WBCes. | inactivates inflammatory substances; attacks parasites | |
iii. Basophils | About twice the size of RBCs; nucleus Bilobed | Less than 1% of WBCes | Releases anticoagulant (Heparin); and histamine which granulocyte | |
Agranulocyte
| i- Monocytes | 3-4 times larger than 3% of RBCs; nucleus round WBCes or lobed |
| Give rise to macrophages which destroy particles by phagocytosis |
ii- Lymphocytes | Slightly larger than RBCes, nucleus nearly fills cell | 32% of WBCes | Produce Antibodies
| |
Platelets | Fragments of bone marrow cells (megakaryocytes) | 250.000 per mm3 | Involved in blood clotting
| |
| Description | Amount in %age | Major Functions | |
| Plasma | Liquid portion of blood | 55% by volume carries carries | Carries blood cells and important blood proteins, hormones, salts, etc. |