What is the trigone area of the bladder?
The trigone is a triangular portion of the bladder floor bordered (ventrally) by the internal urethral opening or bladder neck and (dorsolaterally) by the orifices of the right ureter and left ureter.
Why is the trigone of bladder important?
Two of the openings are from the ureters and form the base of the trigone. Small flaps of mucosa cover these openings and act as valves that allow urine to enter the bladder but prevent it from backing up from the bladder into the ureters. The third opening, at the apex of the trigone, is the opening into the urethra.
What are the parts of urinary bladder?
In humans the bladder is a hollow distensible organ that sits on the pelvic floor. Urine enters the bladder via the ureters and exits via the urethra….
| Urinary bladder | |
|---|---|
| Precursor | urogenital sinus |
| System | Urinary system |
| Artery | Superior vesical artery Inferior vesical artery Umbilical artery Vaginal artery |
What nerves supply bladder?
The lower urinary tract is innervated by 3 sets of peripheral nerves: pelvic parasympathetic nerves, which arise at the sacral level of the spinal cord, excite the bladder, and relax the urethra; lumbar sympathetic nerves, which inhibit the bladder body and excite the bladder base and urethra; and pudendal nerves.
What is the main function of bladder?
Bladder. This triangle-shaped, hollow organ is located in the lower abdomen. It is held in place by ligaments that are attached to other organs and the pelvic bones. The bladder’s walls relax and expand to store urine, and contract and flatten to empty urine through the urethra.
What does a bladder do?
What nerve Innervates the urinary bladder?
Why is the trigone of the urinary bladder clinically important?
The trigone is a triangular muscular structure located between the bladder and urethra. Effective connection between the ureters and the trigone are vital for proper functioning of the ureteral valve mechanism.
What is the anatomy and physiology of the bladder?
Bladder Anatomy and Physiology. The urinary bladder lies in the anterior part of the pelvic cavity. When distended, the organ has an approximately spherical shape, but when empty, it assumes the form of a tetrahedron with four angles and four surfaces.
What surrounds the urinary bladder?
The urinary bladder is made of several distinct tissue layers: The innermost layer of the bladder is the mucosa layer that lines the hollow lumen. Surrounding the mucosal layer is the submucosa, a layer of connective tissue with blood vessels and nervous tissue that supports and controls the surrounding tissue layers.
What is the function of the human bladder?
Functions of the Bladder: The purpose of the urinary bladder is to store urine prior to elimination of the urine from the body. The bladder also expels urine into the urethra by a process called micturition (also known as urination).