56 



ANATOMY AND PHYSIOLOGY. 



Bladder. — This is a muscular sac, a urine reservoir, located 

 in the inferior and anterior part of the pelvic cavity. Ovoid in 

 shape. This organ is supported in place by a variety of liga- 

 ments. It is in relation above, in the male, to the rectum ; in the 

 female, to the vagina and below to the floor of the pelvis. It is 

 covered in front by peritoneum and is in relation to the coiled 

 small intestine. 



L. KIDNEY 



R. KJDNEY 



URETER 



URETER 



FIG. 25. URINARY APPARATUS IN DIAGRAM. iU. H. R.) 

 P, A, i'osttrior aorta; D, D, niial arteties; P, peritoneal coat of bladderp 

 Mus., muscular coat; Muc, mucous coat. 



Openings. — Three on the posterior of the organ ; viz., one 

 to the urctlira, and two for the ureters. The neck of the blad- 

 der is composed of a band of yellow elastic tissue around urethra 

 and is pulled open by longitudinal muscle fibers when urine is 

 to be passed. No distinct sphincter or muscle fibers at the 

 neck. 



