THE URINARY APPARATUS 



[CH. XXXVI. 



The epithelium rests on a vascular coriura, and this is covered by 

 submucous tissue containing an inner longitudinal and an outer 



FIG. 421. Malpighian corpuscle, injected through the renal artery with coloured gelatin ; a, glomerular 

 vessels ; b, capsule ; c, anterior capsule ; d, afferent vessel of glomerulus ; e, efferent vessels ; 

 /, epithelium of tubes. (Cadiat.) 



circular muscular layer. Outside this a plexus of veins passes in- 

 sensibly into the surrounding erectile tissue. 



FIG. 422. Section of a small portion of the prostate, a, gland duct cut across obliquely ; b, gland 

 structure; c, prostatic calculus. (Cadiat.) 



