Question

what are the components of blood ?

Answer 1

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Blood is a liquid, which has cells of various kinds suspended in it. Main components of blood are :

$\small \bf{Plasma : }$
➡️ The fluid part of the blood is plasma.
$\small \bf{RBC : }$
➡️One type of cells are the red blood cells [RBC] which contain a red pigment called haemoglobin.
$\small \bf{WBC : }$
➡️ The blood also has white blood cells [WBC] which fight against germs that may enter our body.
$\small \bf{Platelets : }$
➡️ The clotting of blood is caused by another type of cells in the blood, called platelets.

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Answer 2

Answer:

Plasma

Plasma constitutes 55% of total blood volume. Composed of 90% water, salts, lipids and hormones, it is especially rich in proteins (including its main protein albumin), immunoglobulins, clotting factors and fibrinogen.

Plasma performs several functions: transporting blood cells and nutrients; regulating the body’s water and mineral salts; irrigating tissues; providing a defence against infections; and coagulating blood.

White Blood Cells

There are between 6,000 and 8,000 white cells per cubic millimetre of blood. White cells, slightly larger than red cells, are also called leukocytes. They purify and protect the body from infections. Once an infection is detected in any part of the body, the while cells move in to fight it.

Platelets

Platelets, or thrombocytes, are smaller than the red and white blood cells. Platelets play a role in blood coagulation and wound healing. When a blood vessel ruptures, platelets combine with fibrin, derived from fibrinogen, to form a clot.

Red Blood Cells 

A drop of blood the size of a pinhead contains approximately 5 million red blood cells (erythrocytes). They are small biconcave disks without a nucleus and get their red colour from an iron-containing protein called hemoglobin. Red cells make up between 37% and 43% of blood volume in women and between 43% to 49% in men. Red blood cells carry oxygen throughout the body.