Urinary Bladder and Ureters Excretory System

Urinary Bladder Cross Section What do you Observe? .

Ureter – Cross Section

Urinary Bladder and Ureters A hollow muscular organ that rests in the pelvic cavity, posterior to the symphysis pubis. Size depends on contents. Ureters enter the bladder on the posteriolateral surface and the urethra exits the bladder inferiorly. The ureters and urinary bladder are lined with transitional epithelium surrounded by a lamina propria, muscle, and a fibrous serosa.

More. . . Histology can range from 4-5 cell layers thick, when the bladder is empty, to 2-3 when full. The epithelia of the urethra is stratified squamous. Smooth muscle of bladder forms internal urinary sphincter at the junction of the urethra with the bladder. External urinary sphincter is skeletal and it drops through the pelvis.