THE EFFECTS OF LOCAL HEATING OF THE TESTIS ON THE FLOW AND COMPOSITION OF RETE TESTIS FLUID IN THE RAT, WITH SOME OBSERVATIONS ON THE EFFECTS OF AGE AND UNILATERAL CASTRATION

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Authors:
B. P. SETCHELL
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G. M. H. WAITES
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Summary.

The concentration of spermatozoa in the rete testis fluid of rats increased gradually with age and reached adult levels at about 250 g body weight, whereas fluid secretion per unit weight of testis reached adult rates at a body weight of about 100 g. Unilateral castration had no effect on the weight of the remaining testis or on its fluid secretion; sperm concentration in rete testis fluid was only affected in very young rats. Local heating of the testes of rats was followed by a fall in the sperm concentration in rete testis fluid beginning between 6 and 10 days, and lasting until 39 days, after heating. This fall was associated with a decrease in testis weight which persisted after the concentration of spermatozoa in rete testis fluid had returned to normal. However, there was no change in fluid secretion per unit weight of testis, nor was there any change in the concentration of inositol, glycine or potassium in rete testis fluid.

 

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