Question

Name the tubular knot fitting like a cup on the upper side of the testis.

Answer 1

The epididymis is a tube that connects a testicle to a vas deferens in the male reproductive system. It is present in all male reptiles, birds, and mammals. It is a single, narrow, tightly-coiled tube in adult humans, 6 to 7 meters in length connecting the efferent ducts from the rear of each testicle to its vas deferens.

Spermatozoa formed in the testis enter the caput epididymis, progress to the corpus, and finally reach the cauda region, where they are stored. Sperm entering the caput epididymis are incomplete—they lack the ability to swim forward (motility) and to fertilize an egg. Epididymal transit takes 2-3 days in humans (longer in other species), but the sperm can be stored in the cauda for 2–3 days. During their transit in the epididymis, sperm undergoes maturation processes necessary for them to acquire motility and fertility. Final maturation (capacitation) is completed in the female reproductive tract.