sphincter
Nervous control of urination involves the bladder mechanism. The bladder mechanism involves filling and releasing of the bladder. The mechanism is controlled by various muscles such as the pelvic floor muscle and sphincter muscles.
it is the boundry of control of what enters and exit the cells
The tube that travels from the kidney to the bladder is called the ureter, not to be confused with the tube that travels from the bladder to the exit point from the body, which is called the urethra.
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Liquid wastes from the body exit through the urinary system by being excreted as urine. The kidneys filter waste from the blood, which then travels through the ureters to the bladder for storage. When the bladder is full, urine is expelled through the urethra.
The Urethracarries Urine from the Urinary Bladder to the exterior of the body.
Urine exits the body at varying pressures, typically ranging from 8 to 20 pounds per square inch (psi). This pressure is influenced by factors such as the bladder's contractions and the individual's muscle control.
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The tube connecting the renal hilus of the kidney to the bladder is the ureter. In the renal hilum the ureter, renal blood vessels and nerves enter or exit the kidney.
The anus is the exit point of the digestive system. Its main function is to expel waste material, including undigested food, from the body in the form of feces. The anus has sphincter muscles that control the release of feces from the rectum.
We can control air pollution points by adding air filters to the exit points.
down to the bladder via the uriters, then out. Urine from each kidney drains through a tube called a ureter and collects in the bladder. As the bladder fills, its muscular wall stretches. When it is full, receptors in the wall send a signal to the brain and trigger the urge to urinate. During urination the muscles that close the bladder exit relax to release the urine.