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29 Cards in this Set
- Front
- Back
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where sertoli cells are and sperm develop
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within seminiferous tubules
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where leydig cells are and androgens are synthesised
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between seminiferous tubules
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influence spermatogenesis, and mediate hormones
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sertoli cells
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produce androgens
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leydig cells
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caput
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head of epididymis
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corpus
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body of epididymis
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cauda
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tail of epididymis
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where fluid from sertoli cells is resorbed
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caput of epididymis
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where the sperm mature
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corpus of epididymis
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produces large number of spermatogonia
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mitotic proliferation
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generates genetic diversity (chrmomatids exchange genetic material)
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meiotic division
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what does cytodifferentiation (spermiogenesis) do to the genes?
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packages genes for delivery to oocyte
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what is the corpus cavernosum
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main body of penis
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what does the corpus spongiosum surround?
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urethra
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has androgen dependent spikes on its glans penis
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tom cat (cats are induced ovulators)
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penis has a stiff spine
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alpaca
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has a corkscrew shaped penis
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boar
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characteristics:
limited erectile tissue sigmoid flexure |
fibroelastic penis
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Characteristics:
large corpus cavernosum no sigmoid flexure |
musculovascular penis
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decapacitation factors in seminal plasma
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glycoproteins
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energy substrate in seminal plasma
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fructose and sorbitol
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stops cell coagulation and formation of seminal stones
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citric acid
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neutralise acid pH of vaginal fluids
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buffers
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reducing agent to prevent sperm oxidation at ejaculation
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ascorbic acid
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stimulates muscle contractions in female tract
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prostaglandins
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Advantage:
penis can be retracted into body until erection |
fibroelastic penis
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retractor penis muscles function
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hold sigmoid flexure
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what causes the penis to be held in the sheath?
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retractor muscles contracted
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what causes penis to protrude?
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retractor muscles relaxed
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