Spermatogenesis And Oogenesis

Created by: HedleyBaulf
Created on: 19-05-16 12:03

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

Card 4

Front

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

Back

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

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Spermatogenesis And Oogenesis