MAMMALIA. 



297 



The renal artery divides within the kidney, and from its 

 branches small afferent arteries run to Bowman's capsules and 

 break up into glomeruli. A small efferent vein arises from each 

 glomerulus. The efferent veins now break up into a network of 

 capillaries surrounding the glandular parts of the tubules, and 

 the factors of the renal vein take origin in this network. 



ft. 



Fig. 89. URINOGENITAL ORGANS OF EABBIT. A, male; B, female; C, 

 horizontal section of right kidney ; co and md, cortex and medulla of 

 kidney (in C) ; x , placed on urinary pyramid; ur, ureter; u.b, urinary 

 bladder; r, rectum; r.gl, rectal gland; a, anus; p.s., perineal space; 

 p.gl, perineal gland (in A, the aperture is shown by a dot); t, sper- 

 maries (testes); ep and ep', caput and cauda epididymis; gu, guber- 

 naculum; v.d, spermiduct (vas deferens); ut.m., uterus masculinus; 

 pr, pr', and pr", lobes of prostate; u.-g.c, urinogenital canal; c.c, cor- 

 pus cavcrnosum ; gl.p, glans penis ; or, left ovary ; F. t, left Fallopian 

 tube; F.t', funnel of ditto; u,u', left and right uteri, the latter cut 

 short; o.u and o.u', the mouths of the left and right uteri, to show 

 which the vagina, va. has been cut open; vb, vestibule; gl.cl, glans 

 clitoridis. 



Excretion (cf. p. 206). The nitrogenous waste-products are 

 urea (CH 4 N 2 O) and Mppuric acid (C 9 H 9 NO 3 ). 



The male reproductive organs (Fig. 89) consist of spermaries 

 (testes), from which spermiducts (vasa deferentia) proceed. These 

 communicate with a urinogenital canal traversing a cylindrical 

 penis. Other accessory parts are present. 



