Nitrogenous Wastes

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Nitrogenous Wastes
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Hypothetical Archinephros
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External glomerulus
from branches of dorsal aorta
(near nephrostome)
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Internal glomerulus
Inside Bowmans capsule
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Functions of the kidney
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Renal corpuscle
Amphibian opisthonephros
Loss of segmental arrangement
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Mammalian (metanephric) nephron
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A mammalian nephron
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Rat ovary
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Mammalian testis, epididymis, and ductus deferens
Structures derived from Archinephric/mesonephric
ducts Epididymis Ductus deferens Seminal
vesicles
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Rat testis
Sperm production
Testosterone production
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Female salamander urogenital system
In elasmobranchs and urodeles the archnephric
duct splits into -kidney duct and the -Mullerian
or oviduct
In most vertebrates, the oviduct forms as a
groove in the peritoneum
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Oviduct of salamander
breeding
Non-breeding
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Various mammalian uteri
Oviducts in most vertebrates differentiate into
regions, such as Fallopian tubes, uterus and
vagina. The uterus shows varying degrees of
fusion.
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In males, the Mullerian ducts degenerate.
Male salamander urogenital system
Structures derived from Archinephric/mesonephric
ducts Epididymis,Ductus deferens,Seminal vesicles
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Cross section of deferent duct of a salamander
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Hemipenes of a lizard
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Various penes
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Male toad urogenital system
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Human (metanephric) kidney
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