Mention the life span of Red blood cells. (in $days$)

Blood does not clot inside the blood vessels due to the presence of

Which of the following components, if introduced into the bloodstream, will cause blood clotting at the site of introduction?

$A$ woman is married for the second time. Her first husband was $ABO$ blood type $A,$ and her child by that marriage was type $O.$ Her new husband is type $B$ and their child is type $AB.$ What is the woman's $ABO$ genotype and blood type?

Identify the function of the cell shown in the image.

If a drop of each of the following is placed on four separate slides,which one will not coagulate?