I think it’s A, begins to change :))
Curing heart disease by regenerating damaged heart tissue.
Sperm need temperatures between 2 to 10 degrees Centigrade lower and then the body temperature to develop. This is the reason why the testes are located in a bag of skin called the scrotal sacs<span> (or </span>scrotum<span>) that hangs below the body and where the evaporation of secretions from special glands can further reduce the temperature and adjust to the temperature it needs.
I found this and i hope it helps you.</span>
Blood reticulocyte counts provide information regarding rate of erythrocyte formation.