Question

what is blood platelets

Answer 1

$\huge\sf{\underline{\underline{Thrombocytes:}}}$

$\bullet$ Blood platelets are also known as Thrombocytes.

$\bullet$ Thrombocytes are the smallest of the formed elements.


$\sf{\underline{Number:}}$

Blood normally contains:

$\boxed{\sf{1,50,000 - 3,50,000\:platelets\:mm^{-3}}}$


$\sf{\underline{Shape\:and\:Structure:}}$

$\bullet$ Thrombocytes are cell fragments rather than true cells.

$\bullet$ They are rounded bodies.

$\bullet$ They lack nuclei.

$\bullet$ They contain secretory granules in them.


$\sf{\underline{Formation:}}$

$\bullet$ They are produced from special cells in the bone marrow.

$\bullet$ They are called as megakaryocytes.


$\sf{\underline{Life\: span:}}$

$\bullet$ Normally life span of blood platelets is about a week.

$\bullet$ They are destroyed in the liver.


$\sf{\underline{Function:}}$

$\bullet$ Platelets play an important role in blood clotting.

$\bullet$ Platelets can release variety of substances most of which are involved in coagulation of blood.

$\bullet$ They activate the clotting factors in plasma.

$\bullet$ This results in formation of threads of fibrin.


$\sf{\underline{Note:}}$

Purpura is a group of breeding diseases due to thrombocytopenia.

Answer 2

$\huge\mathcal\red{Answer}$

Platelets are also known as thrombocytes

In simple words platelets helps in blood clotting

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