List the functions of the components of blood? OR Explain the composition of blood.
Difficulty: Medium
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. |
Sponsored Ads