Urinary System Structure Summary

Ureter Structure

• Tunica Mucosa (cлuзuсmая оболочка):

• Lined with transitional epithelium (exclusive to urinary system).

• Impermeable to urine components.

• Contains lamina propria made of connective tissue with coarse collagenous fibers.

• Tunica Muscularis (мышечная оболочка):

• Inner longitudinal layer and outer circular layer of smooth muscle cells.

• Tunica Externa (наружная оболочка):

• Adventitia (адвентициальная оболочка) made of loose connective tissue.

Urinary Bladder Wall

• Tunica Mucosa:

• Lined with transitional epithelium on loose connective tissue.

• Tunica Submucosa (nodслuзuистая основа):

• Made of loose connective tissue.

• Tunica Muscularis:

• Inner and outer longitudinal and middle layer of smooth muscles.

• Serosa (серозная оболочка):

• Consists of loose connective tissue and mesothelium.

Urethra Wall

• Tunica Mucosa:

• Initially lined with transitional epithelium; distal parts lined by stratified squamous epithelium.

• Tunica Submucosa:

• Made of loose connective tissue.

• Tunica Muscularis:

• Contains only a longitudinal layer of smooth muscles.

• Tunica Externa:

• Adventitia made of loose connective tissue.