The correct answer is the secretions of the urothelium.
Explanation:
The epithelium coating the urinary bladder surface is known as the urothelium. It is a specific kind of cell exhibiting high elasticity and numerous cellular activities. It signifies the initial line of bladder resistance and a boundary in between the defense mechanisms and pathogens. The purposes of the urothelium comprise immune responses, control of permeability, and communication between the cells that appears to perform the main role in reacting towards infections and injuries.
I think that he correct answer is the secretions from the urothelium. The tight junctions between the urothelial cells, specialized "umbrella cells" lining the surface, and direct bactericidal activity of the vesical mucosa are thought to be capable of defending the bladder from bacteria in the urine.
500-million-year-old fossil found in BC is ancient ancestor of spiders and scorpions. Palaeontologists in British Columbia have found a fossil of the oldest known ancestor of scorpions and spiders.
