Write about the components of mammalian blood
Asked by Kulwinder | 27th Jun, 2017, 09:44: PM
Mammalian blood is composed of plasma and three types of cells, red blood cells, white blood cells, and platelets.
- It is a light yellow-coloured alkaline liquid.
- It mainly consists of water (90–92%), proteins (7–8%), inorganic salts (1%) and other substances (trace amounts).
Red Blood Cells (RBCs/Erythrocytes)
- RBCs are minute, disc-like structures.
- In adults, RBCs are produced in the marrow of long bones.
- In children, RBCs are produced in the bone marrow of all the cells until 5 years of age.
- Mature RBCs do not have nuclei.
- The average life of RBCs is 120 days.
White Blood Cells (WBCs/Leucocytes)
- WBCs are amoeboid.
- WBCs are produced in the bone marrow, lymph nodes and sometimes even in the liver and spleen.
- The average life of WBCs is about 2 weeks.
- WBCs are of different types-Neutrophils, Eosinophils, Basophils, Lymphocytes and Monocytes.
Functions of WBCs
- Formation of Antibodies
Blood Platelets (Thrombocytes)
- Blood platelets are minute, oval or round, non-nucleated structures floating in the blood.
- Platelets are derived from megakaryocytes in the red bone marrow.
- Their life span is 3 to 5 days.
- Blood platelets play an important role in blood clotting.
Answered by Sheetal Kolte | 28th Jun, 2017, 11:15: AM
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