BIOLOGY FORM 5

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SPERMATOGENESIS PROCESS Spermatogenesis the
process by which stem cells develop into  mature
spermatozoa. There are three phases (1)
Spermatocytogenesis (Mitosis), (2) Meiosis, and
(3) Spermiogenesis.

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1. Spermatogenesis is the formation of
sperms. 2. 3. 4.
Spermatogenesis begins along the walls of the
seminiferous tubule in the testis In the
seminiferous tubule, there is a layer of germinal
epithelium that is made up of primordial germ
cells. The primordial germ cells will undergo
mitotic division to produce many diploid
spermatogonia

• 5. A spermatogonia will grow to produce a
  primary spermatocyte.
• Primary spermatocytes will undergo the first
  mitotic division to
• produce two secondary haploid
  spermatocytes.
• 7. Then, every secondary spermatocyte will
  undergo the second meiotic division to
  produce two haploid spermatids.
• 8. The spermatids will differentiate to produce
  spermatozoa or sperms.

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Diagram shows the process of meiosis in
spermatogenesis
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Spermiogenesis  a process of metamorphosis from
a round cell with typical organelles to a highly
specialized, elongated cell well adapted for
traversing the male and female reproductive
tracts and achieving fertilization of an egg.
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Diagram show the transition Spermatid to
Spermatozoan Reference http//www.cvm.okstate.ed
u/instruction/mm_curr/histology/MR/HiMRP4.htm
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Diagrams show the process of spermatogenesis.
The End