Seminiferous tubule

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Seminiferous tubule
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Germinal epithelium
Spermatogenesis about 6 layers of cells
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The two images below are both from the boxed
area, but were photographed at different levels
of focus within the section.
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Sertoli cell nucleus
Spermatocyte
This focus level shows a Sertoli cell nucleus
(large arrow) and a number of primary
spermatocytes (smaller arrows).
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This focus level shows a number of spermatogonia
(arrows).
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This focus level shows a number of spermatogonia
(arrows).
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This slide shows residual bodies (darkly stained)
along with round spermatids (upper right) and
elongated spermatids, whose tails protrude into
the seminiferous tubule lumen (lower left). After
studying this, have a look at a sperm smear to
get an idea of what sperm look like when you look
them in the eye..
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This is a smear (i.e. not an in situ picture) of
rat sperm. Note the "hooked" heads, which are
quite different from the "bulbous" heads of human
sperm.
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Pituitary gland
LH
FSH
Ovarian tissues
oestrogen
oestrogen
Progesterone
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Surge of LH
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4a
4b
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Male gametes
Male parent
New individual
Zygote
Female gametes
Female parent
Prevention of implanation
. Sterilization Prevention of ovulation
Barriers
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