The kidneys are big, reddish, bean-shaped organs positioned in the retroperitoneal area of the posterior abdominal cavity on either side of the spinal column. They contribute to bodily homeostasis by preserving electrolytes and fluids and disposing of metabolic waste.
The ureters are paired tubular structures that transport urine from the kidneys to the bladder. They are coated by transitional epithelium (urothelium), an impermeable layer that coats the urine excretory tubes from the renal calyces to the urethra—the capacity of this epithelium to thin and flatten permits all of these channels to accept urine distension.
The urinary bladder is a reservoir for urine positioned in the pelvis, posterior to the pubic symphysis; when it fills, its size and shape change. The urinary bladder collects urine from the two ureters and holds it until neurological activation induces it to contract and release pee through the urethra. It is bordered by transitional epithelium as well (urothelium).
The kidneys are big, reddish, bean-shaped organs positioned in the retroperitoneal area of the posterior abdominal cavity on either side of the spinal column. They contribute to bodily homeostasis by preserving electrolytes and fluids and disposing of metabolic waste.
The ureters are paired tubular structures that transport urine from the kidneys to the bladder. They are coated by transitional epithelium (urothelium), an impermeable layer that coats the urine excretory tubes from the renal calyces to the urethra—the capacity of this epithelium to thin and flatten permits all of these channels to accept urine distension.
The urinary bladder is a reservoir for urine positioned in the pelvis, posterior to the pubic symphysis; when it fills, its size and shape change. The urinary bladder collects urine from the two ureters and holds it until neurological activation induces it to contract and release pee through the urethra. It is bordered by transitional epithelium as well (urothelium).