How And Where Is The Bladder Located?

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How And Where Is The Bladder Located?
How And Where Is The Bladder Located?

Video: How And Where Is The Bladder Located?

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Video: Position of the Bladder 2023, February

The bladder is a hollow, unpaired organ that stores urine and then excretes it from the body. How does the bladder work? And is there a difference in its anatomy and location in men and women?

How and where is the bladder located?
How and where is the bladder located?

In men and women, the structure of the bladder is the same. Its apex faces the anterior abdominal wall. The area of ​​the urinary body expands from the apex and narrows to the bottom - this narrowing is called the neck of the bladder, and is the transition to the urethra.

The walls of the bladder are covered from the inside with a mucous membrane, above it is the submucosa, and above this base is the muscle layer and the outer membrane of fibrous connective tissue. The muscle layer is thick: when the bladder is emptied, the muscle walls contract and reach 15 mm in thickness.

However, in children, the shape of the bladder changes with the growth of the entire body. Only born babies have a fusiform bladder, after a few years it becomes pear-shaped, and by eight years - egg-shaped. And the bladder of children acquires the same shape as in adults by adolescence.

The bladder is the most important organ of the human genitourinary system, each part has its own structure.

Mucous membrane

The mucous membrane lines the inside of the bladder. When the organ is filled with urine, this membrane is straightened, when the bladder is empty, it folds. The mucous membrane is covered with cells of the transitional epithelium, the shape of which depends on the fullness of the urinary. If it is empty, the cells of the epithelium become rounded, and if full, they become thinner and tightly pressed against one another. Actually, this is what gives the mucous membrane the ability to stretch and shrink.

In front of the bottom of the bladder is the inner opening of the urethra, through which urine is removed from the body. The openings of the ureters, through which urine enters the bladder, are located at two corners of this organ, on the left and right, respectively.

Submucosa and muscularis

The submucosa is needed so that the mucous membrane can fold when the bladder is empty. It is not in the area of ​​the triangle.

The muscular membrane consists of smooth muscle tissue, in the area where the bladder passes into the urethra, it forms the sphincter with smooth muscles. When the body drains urine, the sphincter opens. The rest of the time, it is closed and protects a person from incontinence.

In the middle of the urethra there is also a sphincter - involuntary. It is formed by striated musculature. In the process of urination, the walls of the bladder tighten, and the muscles of both sphincters relax.

Nerves and blood vessels

The branches of the right and left umbilical arteries are attached to the body of the bladder and to its apex, which supply blood to these parts of the organ. The bottom and side walls of the bladder are supplied with blood through the lower urinary arteries. And the outflow of venous blood into the internal iliac veins and into the venous plexus occurs through the urinary veins.

The supply of nerves to the bladder is carried out using the lower hypogastric plexus, femoral-genital nerves, and pelvic visceral nerves.

Location of the bladder

The bladder is located in the small pelvis: it is located behind the pubic articulation, from which it is fenced off by a layer of loose tissue that lies behind the pubis. When the bladder fills, its tip touches the anterior abdominal wall, while the body of the organ begins to protrude above the pubic articulation.

The lateral surfaces of the bladder are in contact with the pubococcygeal muscle, the paired muscle, the iliococcygeal muscle. On all sides, the bladder is covered with a peritoneum, which in men passes to the rectum and forms a vesicoprectal cavity, and in women it passes to the uterus and forms a vesicouterine depression.

The bladder is attached to the walls of the small pelvis and adjacent organs with the help of fibrous cords. However, in addition to them, its fixation is supported by the initial section of the urethra and the ureters. The bladder is fastened with the help of the prostate in men, and with the urogenital diaphragm in women.

Among women

In women, the bladder is located in front of the uterus and vagina, the walls of which are in contact with it. This arrangement is especially true for pregnant women, because as the fetus grows, the uterus grows, and every day it puts more pressure on the bladder. Because of this, urination may become more frequent or, conversely, become more rare, and after a miction, a feeling of incomplete emptying may occur. The mixing process itself can also be accompanied by discomfort. However, all this is natural, and does not entail any negative consequences, and eventually passes.

The danger is possible only after a 23-week period, since the uterus at this time can compress the urinary tract. If this happens, urine will stagnate and irritate the lining of the bladder, seriously increasing the risk for infections.

In men

In men, the bladder is located above the prostate, which it touches with the walls, and between the seminal ducts, which run along the sides of the bladder. Their urethral canal is longer than that of women (3 cm for women, 15 cm for men), which protects the organ from infection. And the structure of the urinary tract is similar to that of a woman.

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