Editor

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