Spermatogenesis And Oogenesis

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Spermatogenesis
Occurs within seminiferous tubules of the testes. Inside the walls of these tubules are precursor stem cells (Spermatogonium: Diploid -> Give rise to future sperm cells)
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Leydig cells
Found on interstitrum; release testosterone which stimulates the stem cell to differentiate into the diploid primary spermatocyte.
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General process
Spermatogonium -> Primary Spermatocyte -> Secondary Spermatocyte -> Spermatids -> Sperm Cells
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Sertoli Cells
Provide nutrients to the growing sperm cells and help remove unwanted cytoplasm.
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Final Stage
Once sperm cells are produced in the seminiferous tubules they move into a region of highly convoluted tubules called the epididymus, where sperm cells mature and are stored until release.
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Oogenesis
Process by which female gametes are produced in the ovaries. Unlike in males, all the primary oocytes are produced during foetal development.
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Oogonium
Precursor stem cells. During foetal development, they differentiate into primary oocytes.
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Development of primary oocyte
During puberty the cycle begins where one primary oocyte undergoes meiosis I to produce the secondary oocyte which remains frozen in metaphase II. During fertilisation the secondary oocyte finishes meiosis II to produce an ovum.
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General Process
Oogonium (2n) -> Primary Oocyte (2n) -> Secondary Oocyte (n) -> Ovum (n)
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Other cards in this set

Card 2

Front

Found on interstitrum; release testosterone which stimulates the stem cell to differentiate into the diploid primary spermatocyte.

Back

Leydig cells

Card 3

Front

Spermatogonium -> Primary Spermatocyte -> Secondary Spermatocyte -> Spermatids -> Sperm Cells

Back

Preview of the back of card 3

Card 4

Front

Provide nutrients to the growing sperm cells and help remove unwanted cytoplasm.

Back

Preview of the back of card 4

Card 5

Front

Once sperm cells are produced in the seminiferous tubules they move into a region of highly convoluted tubules called the epididymus, where sperm cells mature and are stored until release.

Back

Preview of the back of card 5
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