# sperm_of_travel

 (# dr.ahmad)

 Testicles (testes) are the organs where sperms form. If we study the testicles, the testicles have fine tubes called seminiferous tubules, sperm form in these tubules, 90% of the weight of the testicles is caused by these seminiferous tubules. These seminiferous tubules are present in the area outside the blood vessels, lymphatic tissues and a special type of cells called interstitial cells or then leyding cells. Luteinizing glands from the pituitary gland present in the brain reach those leyding cells through the blood, in its response leyding cells emit testosterone hormone This hormone produces male characteristics in the body such as development of male sex organs, role in becoming sperm, and other male characteristics such as growing of masles, heavy of sound, beard mustache, sexual desire etc.

 Now we talk back to seminiferous tubules that form sperm inside. There are special cells inside these seminiferous tubules called spermatogonia. These spermatogonia are formed when the baby (male) is present in the womb of the mother. These cells actually come into seminiferous tubules from the yolk sac (an extra eymbryonic membrane of the embryo).

 The spermatogonia cells present in these seminiferous tubules have a lot of stratification and they continue to be distributed throughout their life. When spermatogonia divides, two types of cells form, one being the same as the new spermatogonia and the other primary spermatocytes.

 Distribution of these primary spermatocytes when the period of puberty comes