👉 Peristethium is a type of epithelial tissue found in the lining of the urinary bladder. It is composed of multiple layers, including the apical and basolateral surfaces. The apical surface is smooth and is where the urine flows into the bladder through a small opening known as an urethra. The basal surface is rough and is where the urine collects. The peristium also includes cells that are responsible for producing mucus to help with urination, and it also contains
