Define the structure of seminal vesicle.
Answers
The seminal vesicles are a pair of glands that are positioned below the urinary bladder and lateral to the vas deferens. Each vesicle consists of a single tube folded and coiled on itself, with occasional diverticula in its wall.
Explanation: Structure of seminal vesicle
Males have two seminal vesicles, which are located below the urinary bladder and at the end of the vasa deferentia, where they enter the prostate. Each vesicle is a coiled and folded tube with occasional outpouchings in its wall known as diverticula. The excretory duct, which connects with the vas deferens on that side of the body to form an ejaculatory duct, is the lowest half of the tube. The ejaculatory channels pass via the prostate gland before opening into the prostatic urethra's verumontanum. The vesicles are 5–10 cm in length, 3–5 cm in diameter, and contain roughly 13 mL of fluid.
The vesicles receive blood supply from the vesiculo deferential artery, and also from the inferior vesical artery. The vesiculo deferential artery arises from the umbilical arteries, which branch directly from the internal iliac arteries.Blood is drained into the vesiculo deferential veins and the inferior vesical plexus, which drain into the internal iliac veins. Lymphatic drainage occurs along the venous routes, draining into the internal iliac nodes.
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