Reproductive System

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 Seminal vesicles


Structure of seminal vesicles


Seminal vesicles are the paired glands situated in lower abdomen on either side of Prostate gland behind urinary bladder. 
Each seminal vesicle vesicle is a hollow sac of irregular shape and lined by complexly folded mucus membrane. The mucous membrane is formed by pseudostriated columnar epithelium. These epithelial cells are secretary in nature. 
The secretion from seminal vesicles is called seminal fluid. Seminal fluid is added to semen via ampulla of vas deferens. 

Properties and composition of seminal fluid

Properties


The seminal fluid is mucoid and viscous in nature. It is neutral or slightly alkaline in reaction. It adds to the bulk of semen as it forms 60% of total semen. 

Composition


The seminal vesicles secrete several important substances in figure. 






Functions of seminal fluid

1. Nutrition to sperms

The Fructose and other nutritive substances in seminal fluid are utilized by sperms after being ejaculated into female genital tract. 

2. clotting of semen

The fibrinogen from seminal fluid is converted into the coagulum as soon as semen is ejaculated. 

3. On fertilization


The prostaglandin of seminal fluid enhances fertilization of ovum by the following processes. 
     1. Increasing the receptive capacity of cervical mucosa for sprems. 
     2. Causing reverse peristaltic movement of uterus and follopian tubes. This, in turn, increases the rate of transport of sperms in female genital tract during coitus. 











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