Results 121 to 130 of about 306,616 (240)

Ultrastructure of the reproductive system of the black swamp snake (\u3ci\u3eSeminatrix pygaea\u3c/i\u3e). Part III. The sexual segment of the male kidney. [PDF]

open access: yes, 2002
In mature male snakes and lizards, a distal portion of the nephron is hypertrophied in relation to its appearance in females and immature males. This sexual segment of the male kidney apparently provides seminal fluid that is mixed with sperm and ...
Sever, David M.
core   +1 more source

New insights into roles of acidocalcisomes and contractile vacuole complex in osmoregulation in protists. [PDF]

open access: yesInt Rev Cell Mol Biol, 2013
Docampo R   +4 more
europepmc   +1 more source

The relation of contractile and food vacuoles to rhythms in Paramecium

open access: yesExperimental Biology and Medicine, 1925
Experiments were undertaken to determine the relation between metabolic activity, as indicated by the rate of contractile vacuole pulsations and the size and number of food vacuoles formed, and the occurrence of rhythms in the division rate. The animals studied were pedigree races of Paramecium aurelia and Paramecium calkinsi.
openaire   +2 more sources

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