XIIl] 



FEMALE GENERATIVE ORGANS 



197 



the corpora lutea, if pregnancy does not occur, usually degenerate 

 after a short interval and before another heat period is due, since 



-J" '4' 



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g^ 



-L^' 



Fig. 105. Section through rat's kidney into which ovary has been transplanted. 

 (ir. artery, t-.l. corpus luteum, iiJ'. Graafian follicle, gl.. glomerulus of 

 kidney, o, ovum, ov. st. ovarian stroma, r.t. renal tubule, z.<i.t. zone between 

 ovarian and renal tissue. 



the presence of these organs in the ovaries has an inhibitory 

 influence upon follicular development and upon the occurrence 

 of oestrus. 



^i—l 



