KINESIOL 1AA3 Lecture Notes - Lecture 17: Skeletal Muscle, Transitional Epithelium, Adventitia
18 Apr 2016
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Document Summary
Carries urine: from the renal pelvis to the bladder. Exits the kidney at the hilum: extends inferiorly and medially, enters the urinary bladder. Layers of the ureter: mucosa transitional epithelium and lamina propria, smooth muscle, adventitia. Peristaltic contractions: propel urine through the ureters. Has a physiological valve: doesn"t have a sphincter. Stores urine: located in the pelvic cavity, posterior to the pubic symphysis. Layers of the urinary bladder: mucosa transitional epithelium and lamina propria, smooth muscle detrusor muscle (thicker, adventitia. Increases pressure: pushes urine into the urethra. Trigone region: formed by the ureter and urethra openings, less stretchy. Elastic ct and smooth muscle: prevents urine from leaving the bladder, until pressure is large enough. External urinary sphincter: found in both sexes, skeletal muscle that surrounds the urethra, controls urine flow. Males: longer in males, extends to the end of the penis. Females: shorter in females, opens in the vestibule. Renal pelvis: has no pressure gradient, peristaltic contractions move urine.
