ANAT 216 Lecture Notes - Lecture 9: Prostatic Urethra, Transitional Epithelium, Urination
13 Oct 2016
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Urinary system: lecture 2 (reading material: chapter 26: pages 706-711) Ureters: transfer urine from kidney to bladder. Prevents backflow: retroperitoneal, prevents backflow of urine in ureter* As there is accumulation of fluid in bladder, pressure builds and the distal end of the ureter closes. Mucosa: transitional epithelium on a lamina propria. Muscularis: two layers of smooth muscle (inner longitudinal, outer circular) Distention causes contraction: moved along length of ureter to bladder, peristaltic contraction of muscularis is stimulated by stimulation of stretch receptors receptors in wall of ureter. Gross anatomy: collapsible, muscular sac temporary storage for urine, retroperitoneal in pelvic cavity. Outside peritoneal cavity in males it is located behind the pubic symphysis and in front of the rectum in females it lies under the uterus and in front of the vagina: disenable, rugae. When it empties interior ridges: projects into peritoneal cavity when full, can hold up to one liter of urine, full.
