The mesonephric duct connects the primitive kidney, the " mesonephros ", to the cloaca and serves as the anlage for certain male reproductive organs.
12.
Like most air-breathing land snails, " Polymita picta " has female and male reproductive organs ( hermaphroditic ), ie it is unable to self-fertilization.
13.
She chose male reproductive organs over female not because of any prurient interest, she says, but because they're so much simpler : fewer parts, fewer functions.
14.
In 1876, Freud spent four weeks at Claus's zoological research station in Trieste, dissecting hundreds of eels in an inconclusive search for their male reproductive organs.
15.
Two other species of " Harpaphe " ( " Mendocino and Humboldt counties ) can only be distinguished by close examination of the male reproductive organs ( gonopods ).
16.
His results, which appear in the current issue of the journal Nature, indicate that male reproductive organs are the pelvic equivalent of peacock feathers _ the fruit of sexual selection.
17.
The testes of the male begin to produce testosterone at puberty in response to LH . Testosterone promotes maturation of the male reproductive organs, development of secondary sex characteristics, and production of sperm by the testes.
18.
In the case of some species of bee, the male reproductive organ detaches and is left behind inside the queen, with the supposed purpose being to prevent semen from leaking out of the queen's reproductive tract.
19.
"' Testicular atrophy "'is a medical condition in which the male reproductive organs ( the testes, which in humans are located in the scrotum ) diminish in size and may be accompanied by loss of function.
20.
Among insects, male reproductive organs differ so dramatically from one species to another that entomologists rely on the particulars of the cerci, epiprocts and other bits of arthropod genitalia to distinguish between species that otherwise look alike.
