Where Is The Bladder Located In Men – 1. Human urinary system: 2. Kidney, 3. Ral pelvis, 4. Ureter, 5. Bladder, 6. Urethra. (Left side with front section)

Vessels: 8. ral artery and vein, 9. Inferior va cava, 10. Abdominal aorta, 11. Common iliac artery and vein

Where Is The Bladder Located In Men

Where Is The Bladder Located In Men

The bladder is a hollow organ in humans and other vertebrates that stores urine in the kidneys before it is excreted in the urine. In humans, the bladder is a distributable organ located in the pelvic floor. Urine enters the bladder through the ureters and comes out through the urethra. The typical adult human bladder holds between 300 and 500 ml (10.14 and 16.91 fl oz) until the urge to void occurs, but can hold much more.

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The Latin expression for “urinary bladder” is vesica urinaria, and the term vesical or the prefix vesico arises in connection with related structures such as vesical veins. The modern Latin word for “bladder” – cystitis – occurs along with related terms such as cystitis (inflammation of the bladder).

In humans, the bladder is a hollow muscular organ located at the floor of the pelvis. In gross anatomy, the bladder can be broadly divided into a fundus (base), a body, an apex, and a neck.

The apex (also known as the apex) is directed forward towards the upper part of the pubic symphysis, and from there the median umbilical cord continues upward towards the navel behind the anterior abdominal wall. The peritoneum is carried by it from the apex to the abdominal wall, forming the midbelly fold. The neck of the bladder is the area at the base of the trigone that surrounds the internal urethral opening leading to the urethra.

The bladder has three openings. Two ureters exit the bladder through the ureteral openings, and the urethras exit the trigone of the bladder. In front of these ureteric openings are mucosal valves that act as valves to prevent the backflow of urine into the ureters.

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It is known as vesicoureteral reflux. Between the two ureteral openings is a raised area of ​​tissue called the interureteric crest.

This forms the upper limit of the trigone. The trigone is the smooth muscle region above the urethra that forms the base of the bladder.

It is an area of ​​smooth tissue that allows urine to flow easily to and from this part of the bladder, as opposed to the uneven surface formed by the rugae.

Where Is The Bladder Located In Men

The walls of the bladder have a series of ridges, thick mucosal folds known as rugae, that allow the bladder to expand. The detrusor muscle is the muscular layer of the wall consisting of smooth muscle fibers arranged in spiral, longitudinal and circular bundles.

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The length of the detrusor muscle can vary. It can also contract for a long time during urination and remains relaxed while the bladder is filling.

In men, the prostate gland is located outside the opening of the urethra. The middle lobe of the prostate gives rise to the mucous membrane behind the inner urethral opening of the bladder, called the uvula. When the prostate enlarges, the uvula may also enlarge.

The bladder is located below the peritoneal cavity near the pelvic floor and behind the pubic symphysis. In men, it is located in front of the rectum, separated by the recto-vesical sac and supported by the levator ani and fibers of the prostate gland. In women, it is located in front of the uterus, separated by the vesico-uterine sac and supported by the elevator ani and the upper part of the vagina.

The superior vesical artery supplies blood to the upper part of the bladder. The lower part of the bladder is supplied by the inferior vesical artery, both branches of the internal iliac arteries.

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Vous drainage begins in a network of small vessels on the lower lateral surfaces of the bladder, which join the lateral ligaments of the bladder and progress towards the internal iliac vessels.

Lymph drained from the bladder begins as a series of networks along the mucosal, muscular, and serosal layers. These form three groups of vessels: one near the trigone, which drains the base of the bladder; a set that drains the upper part of the bladder; and another set draining the outer lower surface of the bladder. The majority of these vessels drain into the external iliac lymph nodes.

Motor supply is provided mostly by sympathetic fibers arising from the superior and inferior hypogastric plexuses and nerves, and by parasympathetic fibers from the pelvic splanchnic nerves.

Where Is The Bladder Located In Men

Sound due to distraction or irritation from the bladder (such as infection or stone) is transmitted primarily through the parasympathetic nervous system.

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When viewed under a microscope, the bladder can be seen to have an inner lining (called the epithelium), three layers of muscle fibers, and an outer advtitia.

The inner wall of the bladder is called the urothelium, a type of transitional epithelium consisting of three to six cell layers; Cells may become more cuboidal or flatter, depending on whether the bladder is empty or full.

Additionally, they are covered by a mucosa consisting of a surface glycocalyx that protects the underlying cells from urine.

These layers are surrounded by three layers of muscle fibers arranged as a longitudinally oriented inner fiber layer, a middle layer of circular fibers, and an outermost layer of longitudinal fibers; these form the detrusor muscle, which is visible to the naked eye.

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The cloaca is located at the back of the developing embryo. In the fourth to seventh week, this divides into the urogenital sinus and the beginning of the anal canal, and a wall called the urorectal septum forms between these two sacs.

The urogital sinus is divided into three parts; the upper and largest part becomes the bladder; The middle part turns into the urethra, while the lower part varies depending on the biological sex of the embryo.

The human bladder originates from the urogenital sinus and initially continues with the allantois. The upper and lower parts of the bladder develop separately and coalesce around the middle part of the development.

Where Is The Bladder Located In Men

In men, the base of the bladder is located between the rectum and the pubic symphysis. It is superior to the prostate and is separated from the rectum by the recto-vesical sac. In women, the bladder is located below the uterus and in front of the vagina; Therefore, its maximum capacity is lower than men. It is separated from the uterus by the vesico-uterine sac. In babies and young children, the urinary bladder is empty, but is in the abdomen.

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Urine excreted by the kidneys collects in the bladder due to drainage from two ureters before being excreted through urination (urination).

Urine leaves the bladder through the urethra, a single muscular tube located in an opening called the urethra, where it exits the body.

Urination involves coordinated muscular changes involving a spine-based reflex along with higher inputs from the brain.

During urination, the detrusor muscle contracts and the external urinary sphincter and perineal muscles relax, allowing urine to pass through the urethra and out of the body.

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The urge to urinate is caused by stretch receptors that activate the bladder to hold 300 to 400 mL of urine.

As urine accumulates, the rugae flattens and becomes thinner as the wall of the bladder stretches, allowing the bladder to store larger amounts of urine without a significant increase in internal pressure.

Stretch receptors in the bladder send signals to the parasympathetic nervous system, stimulating muscarinic receptors in the detrusor to contract the muscle distal to the bladder.

Where Is The Bladder Located In Men

This encourages the bladder to expel urine through the urethra. The main receptor activated is the M3 receptor, but M2 receptors are also involved and although they outnumber M3 receptors, they are not as sensitive.

What Are The Symptoms Of Bph?

The main relaxant pathway is via the adilyl cyclase cAMP pathway, which is activated via β3 adrenergic receptors. β2 adrenergic receptors are also found in the detrusor and are more numerous than β3 receptors, but they do not have as significant an effect on relaxing the detrusor smooth muscle.

Cystitis means infection or inflammation of the bladder. It usually occurs as part of a urinary tract infection.

It is more common in women than m due to the shorter urethra in adults. It is common in boys during childhood and occurs later in life when a large prostate can cause urinary retraction.

Other risk factors include prostate cancer or other causes of obstruction or narrowing, such as the presence of vesico-ureteral reflux; the presence of external structures in the urinary tract, such as a urinary catheter; and neurological problems that make it difficult to pass urine.

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Infections involving the bladder can cause pain in the lower abdomen (above the pubic symphysis, called “suprapubic” pain), especially before and after urination, and a desire to urinate frequently and with little warning (urinary urgency).

If a urinary tract infection or cystitis is suspected, the doctor may request a urine sample. A dipstick inserted into the urine can be used to see if there are white blood cells in the urine or the presence of nitrates.

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