What is the urinary bladder in anatomy?
The urinary bladder is a temporary storage reservoir for urine. It is located in the pelvic cavity, posterior to the symphysis pubis, and below the parietal peritoneum. The size and shape of the urinary bladder varies with the amount of urine it contains and with the pressure it receives from surrounding organs.
What are the 4 layers of the urinary bladder?
Urinary Bladder. The wall of the urinary bladder has four layers. From the inside towards the outside they are: mucosa, submucosa, muscularis, and serosa or adventitia. The outside layer is either serosa or adventitia, depending on location–see your textbook for an explanation.
What type of tissue is found in the urinary bladder?
The urothelium is the inner lining of the bladder. It is made up of urothelial cells (also called transitional cells). The urothelium is also called the transitional epithelium. The lamina propria (also called the submucosa) is a thin layer of connective tissue that surrounds the urothelium.
How many parts are in the urinary bladder?
The urogenital sinus divides into three parts, with the upper and largest part becoming the bladder; the middle part becoming the urethra, and the lower part changes depending on the biological sex of the embryo.
What are the two main functions of the bladder?
The bladder is a hollow muscular organ in the pelvis, just above and behind the pubic bone. The bladder has two main functions which are the storage and emptying of urine.
Why transitional epithelium is called urothelium?
The transitional epithelium is also called urothelium because it lines urinary ducts, such as renal calyxes (2 cell layers), urethers (3 to 5 cell layers), urethra (4 to 5 cell layers) and urinary bladder (up to 6 cell layers). These cells form the impermeable barrier to diffusion between urine and blood.
What is histology of kidney?
Each kidney consists of a cortex, medulla and calyces. The nephron is the main functional unit of the kidney, in charge of removing metabolic waste and excess water from the blood.
What membrane covers the bladder?
Serous membrane provides protection to the bladder from friction between organs in the abdominopelvic cavity. The surface of the lateral and inferior sides of the urinary bladder forms a layer of loose connective tissue known as the adventitia.
What are the 4 categories of tissues?
There are 4 basic types of tissue: connective tissue, epithelial tissue, muscle tissue, and nervous tissue. Connective tissue supports other tissues and binds them together (bone, blood, and lymph tissues). Epithelial tissue provides a covering (skin, the linings of the various passages inside the body).
What are the functions of urinary bladder?
The bladder has two main functions which are the storage and emptying of urine. It provides continence, by delaying and controlling urination so that the average person urinates four to eight times per day with a bladder volume of 200-400mls (approx.)