Biology for ( Grade 10 )

• Epididymis peon into a narrow tube vas deferens.


• Somniferous tubules from the spermatogenic tissue of the
  testis.


• It consists of a germinal epithelial layer at the periphery.
  Spermatogenesis occurs at the center.


• It forms spermatogonia which grows and form spermatocytes
  which further grow to form primary spematrocytes, which
  undergo meiosis to form secondary spermatocytes and then
  spematids.


• The later (i.e. spermatids) metamorphose into spermatozoa.


• This process of formation of spermatozoa from spermatogonia

is called as spermatogenesis.

• These spermatozoa are nourished during the development by

nurse cells.

Epithelial layer

Cuboidal cells

Mitosis

Spermtogonia

Primary spematocytes

Secondary spermatocytes

Spermatid

Spermatozoa

these are then nourished by nurse cells

Flow chart showing the process of Spermatogenesis