|
|
|
Bladder
|
- Function: store urine; micturition
- Histologic features;
- lined by transitional epithelium (urothelium) on a basement membrane
- Lamina propria: lies between mucosal basement membrane and the muscularis propria; may contain wisps of smooth muscle but usually does not display fully-developed muscularis mucosa; consists predominantly of loose connective tissue with nerves, vasculature and lymphatics.
- Muscularis propria: consists of three loosely arranged layers of smooth muscle and elastic fibers that contract during micturition
|
|
![](Javascript:PopUp('imagepopup.cfm?imagenumber=hist13.jpg&detail=Bladder: Note the multinucleated superficial or "umbrella" cells, which are oriented parallel to the basement membrane. The intermediate cells beneath the superficial cells, on the other hand, are oriented perpendicular to the basement membrane. The number of cell layers often depends on the degree of distention of the bladder, and varies from 3 to 7 in number.'))
![](Javascript:PopUp('imagepopup.cfm?imagenumber=hist14.jpg&detail=Bladder: Note the multinucleated superficial or "umbrella" cells, which are oriented parallel to the basement membrane. The intermediate cells beneath the superficial cells, on the other hand, are oriented perpendicular to the basement membrane. The number of cell layers often depends on the degree of distention of the bladder, and varies from 3 to 7 in number.'))