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Prostate

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PROSTATE ANATOMY

The prostate is a gland. It has a firm consistency and is commonly described as a walnut shaped or chestnut shaped organ. It measures just over 1 ½ inches across and 1.2 inches thick.

Encompassing the initiating point of the urethra, the prostate is positioned just under the urinary bladder. Ejaculatory ducts and the urethra actually cut through the gland, creating what seems like accidental lobules throughout the prostate. The gland itself is encased within a fibrous capsule.

The urethra receives the ducts that form and extend outward toward the urethra. The glandular tissue is structurally supported via an extensive and intricate network of smooth muscular bands.

This creates a near mesh of structural tissue to create and maintain the shape of the prostate.

PROSTATE DIAGRAM

Prostate
Image: Prostate


The middle rectal artery and the inferior visceral arteries are responsible for meeting the blood demands of the prostate. The prostatic venous plexus is responsible for blood drainage, retracing the corresponding path as blood entry. Venous drainage from the penis also collects in the prostatic venous plexus. The pelvic plexus supplies the prostate with both parasympathetic and sympathetic nerve function.

PROSTATE GLAND

The prostate gland assists in the process of ejaculation of seminal fluid via muscular contractions of the smooth muscle. With these contractions, a sudden force is added to the process of ejaculation. Prostate gland secreted fluids create about 40% of the total volume of seminal fluid.

The secretions from the prostate gland are partially responsible for assisting in sperm cell motility via the thin, milky liquefying agent. The alkaline levels in the prostate secretions are specially developed to protect the sperm cells during their trek into the vagina, as the vagina contains an acidic environment. The prostate’s ability to function properly can be determined by testing the additional enzyme secretion acid phosphatase.
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