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FORMED ELEMENTS OF BLOOD. #MDKUDRATEKABIR.DEFINITION
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#DEFINATION.
Cellular elements of the blood- RBC
Cellular components occupies 40- 45% of the blood and are of three types:

Red blood cell (erythrocyte)

White blood cell (leukocytes)

Blood platelet (thrombocytes)
Cellular component- Red blood cell (erythrocyte)

Production

Bone marrow

Structure

Small, biconcave, disc like structure, nucleus absent

Size

7 micron diameter

Lifespan

120 days

Death

Approx. 2,00,00,000 RBC per minute

RBC count

Male: 5 million RBCs

Female: 4- 5 million RBCs

Major component

Haemoglobin

Major function

Oxygen carrier

Abnormality

Excessive RBC count- Polycythaemia

Abnormally low RBC count- Erythropenia

#DEFINITION
Cellular elements of the blood- WBC

Production

Bone marrow, lymph node and spleen

Structure

Amoeboid shape, nucleus present, lack haemoglobin

Lifespan

2 weeks

Death

Approx. 2,00,00,000 WBC per minute

WBC count

4,000- 8,000 per cubic mm

Abnormality

Excessive WBC count- Leukemia

Abnormally low WBC count- Leukopenia

Function

Phagocytosis

Inflammation

Formation of Antibodies

#DEFINITION
Cellular elements of the blood- Platelet

Production

Megakaryocyte in the bone marrow

Structure

Oval or round, non nucleated

Lifespan

3- 5 days

Platelet count

2,00,000 to 4,00,000 per cubic mm.

Major component

Thrombokinase

Major function

Blood clotting

Abnormality

Abnormally low platelet count- Viral dengue feve