Portland, Maine â For the first time, scientists have figured out how to determine the age of a lobster â by counting its rings, like a tree. Nobody knows how old lobsters can live to be; some people estimate they live to more than 100.
The lamina propria (more correctly lamina propria mucosae) mucosÃ¦ is a thin layer of loose connective, tissue or dense irregular connective, tissue which lies beneath the epithelium and together with the epithelium constitutes the. mucosa
Structure. The bladder wall is made up of 3 layers. 1  The urothelium lines the inside of the bladder, ureters and urethra. 2  It is made up of urothelial cells, or transitional cells. 3  It is also called the transitional epithelium. 4  The lamina propria is a layer of connective tissue. The lamina propria is also called suburothelial connective tissue or subepithelial tissue. 2  The muscularis is the outer layer of the bladder. 3  It is made up of 3 layers of smooth muscle tissue (bladder muscle) called the inner longitudinal, middle circular and outer longitudinal muscles.