Question

how do you say that a cell also has a lifespan and death like an organism?? give one example

Answer 1

Every organism which is born should end its life at some period, so are the cells. They have specific life span and they die at the end of their life span. For example, a red blood cell (RBC) is produced in the bone marrow. It has an average lifespan at about 120 days. It is destroyed in the spleen as it dies.

Hence, bone marrow is considered to be ‘cradle’ and the spleen as the ‘grave yard’ for a RBC cell.

Answer 2

The cells also have a specific lifespan and also after the period has ended results into the death of the cell.
If see in Erythrocytes, they are formed by yolk sac in the early few weeks (in the bone marrow) of embryonic cycle, in later embryonic stage by the liver and spleen, from birth onwards by bone marrow (as said before). Their life span is about 120 days or 4 months to be specific. After the time has ended they are broken down by the liver and the excess RBCs are stored in the spleen (graveyard of RBC).