If the platelets are not present in the blood what happens? (AS2)

a) Platelets are a group of cells which do not have a nucleus.

b) Their major role is to prevent excessive blood loss. Whenever there is any injury to the blood vessel or an opening through which blood can leak, platelets accumulate around that opening and block the flow of blood.

c) Hence, they keep a check on blood loss in case of severe injury due to an accident.

d) If the platelets are not present in the blood, whenever injury occurs or there is leakage of blood, the blood would not clot and keep on flowing. Excessive loss of blood can be harmful to the person and in severe cases, even fatal.