Question

Which one of the following is the correct route that a sperm follows when it leaves the testis of a mammal?

• A. Vas deferens $\to$ Epididymis $\to$ Urethra
• B. Urethra $\to$ Epididymis $\to$ Vas deferens
• C. Epididymis $\to$ Urethra $\to$ Vas deferens
• D. Epididymis $\to$ Vas deferens $\to$ Urethra

Answer 1

The correct option is D Epididymis $\to$ Vas deferens $\to$ Urethra

• From the testis, sperms are collected by the vasa efferentia which transfer them to the epididymis through rete testis.
• Vasa efferentia open in the anterior end of testis which is known as caput epididymis. The middle part is known as corpus epididymis and posterior part is known as cauda epididymis. Sperms pass all these parts of the epididymis and take several days.
• From the cauda epididymis arises the vas deferens which ascends to abdomen and passes over the urinary bladder. The duct from the seminal vesicle joins the vas deferens behind the urinary bladder and form the ejaculatory duct.
• The ejaculatory duct passes through the prostate and open into urethra after its origin from the urinary bladder.

Hence, the route that a sperm follows when it leaves the testis of a mammal is Epididymis, Vas deferens, Urethra.

So, the correct answer is 'Epididymis →→ Vas deferens →→ Urethra'.