Prostate Anatomy

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Prostate – Anatomy Pictures and Physiology – InnerBody › … › Male Reproductive Organs › Testes

The prostate is a small muscular gland located inferior to the urinary bladder in the pelvic body cavity. It is shaped like a rounded cone or a funnel with its base pointed superiorly toward the urinary bladder. The prostate surrounds the urethra as it exits the bladder and merges with the ductus deferens at the ejaculatory duct.

Prostate Anatomy

Several distinct lobes make up the structure of the prostate:

On the anterior end of the prostate are the two lateral lobes, which are rounded and shaped like orange slices when viewed in a transverse section. The lateral lobes are the largest lobes and meet at the midline of the prostate.

Posterior and medial to the lateral lobes is the much smaller anterior lobe, a triangle of fibromuscular tissue just anterior to the urethra. The fibromuscular tissue of the anterior lobe contracts to expel semen during ejaculation.

The median lobe is found just posterior to the urethra along the midline of the prostate. The median lobe contains the ejaculatory ducts of the prostate.

The posterior lobe forms a thin layer of tissue posterior to the median lobe and the lateral lobes.

The prostate contains two main types of tissue: exocrine glandular tissue and fibromuscular tissue.

Exocrine glandular tissue in the prostate is epithelial tissue specialized for the secretion of the components of semen. Most of the prostate is made of exocrine glandular tissue, as the prostate’s primary function is the production of semen.

Fibromuscular tissue is a mixture of smooth muscle tissue and dense irregular connective tissue containing many collagen fibers. The collagen fibers of the tissue provide strength to the tissue while the smooth muscle permits the tissue to contract to expel fluids. Fibromuscular tissue forms the outermost layer of the prostate and the tissue surrounding the urethra

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Prostate Gland (Human Anatomy): Prostate Picture, Definition – WebMD › Incontinence & Overactive Bladder › Reference

The prostate is a walnut-sized gland located between the bladder and the penis. The prostate is just in front of the rectum. The urethra runs through the center of the prostate, from the bladder to the penis, letting urine flow out of the body.

The prostate secretes fluid that nourishes and protects sperm. During ejaculation, the prostate squeezes this fluid into the urethra, and it’s expelled with sperm as semen.

The vasa deferentia (singular: vas deferens) bring sperm from the testes to the seminal vesicles. The seminal vesicles contribute fluid to semen during ejaculation.

Prostate Conditions

Prostatitis: Inflammation of the prostate, sometimes caused by infection. In some cases, it is treated with antibiotics.

Enlarged prostate: Called benign prostatic hypertrophy or BPH, prostate growth affects virtually all men over 50. Symptoms of difficult urination tend to increase with age. Medicines or surgery can treat BPH.

Prostate cancer: It’s the most common form of cancer in men (besides skin cancer), but only one in 35 men die from prostate cancer. Surgery, radiation, hormone therapy, and chemotherapy can be used to treat prostate cancer. Some men choose to delay treatment, which is called watchful waiting.

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