MH 147 Bladder

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Bladder

Bladder is an expandable vessel for the storage of urine. It is lined with an epithelium that is impermeable to water and ions.

Like the ureters, the bladder is composed of four concentric layers.

(Urothelium) - consists of three to five cell layers.
- - the upper layer of cells that change shape depending on the distention of the bladder.
- thick layer of dense irregular connective tissue rich in collagen and elastic fibers.
- irregular arranged smooth muscle that forms an , and layers.
Outer Layer of Connective Tissue - most of the bladder is covered externally by adventitia with parts of its superior surface covered by serosa of the peritoneum.
- - loose connective tissue with blood vessels, nerves and adipose cells.
- Serosa - composed of a surface layer of mesothelium supported by loose irregular connective tissue.