Question

The given diagram shows LS. of testis showing various parts. Identify the parts labelled (A to G) from the list given below.

(i) Caput epididymis
(ii) Cauda epididymis
(iii) Vas deferens
(iv) Vasa efferentia
(v) Corpus epididymis
(vi) Seminiferous tubules
(vii) Tunica vaginalis
(viii) Tunica albuginea
(ix) Tunica vasculosa
(x) Bete testis

A) A-(ii), B-(iii), C-(iv), D-(x), E-(vii), F-(i), G-(ix)
B) A-(v), B-(iv), C-(iii), D-(vi), E-(i), F-(i), G-(vii)
C) A-(i), B-(iv), C-(x), D-(iii), E-(ii), F-(vi), G-(viii)
D) A-(i), B-(vi), C-(iv), D-(iii), E-(v), F-(x), G-(ix)

Answer 1

Hint: Of all mammals, including humans, the testicle or testis (plural testes) is the male reproductive gland or gonad. It is connected to the female ovary. The testes are responsible for the production of sperm as well as androgens, especially testosterone.

Complete answer:
> The diagram depicts the male sex accessory ducts, which have a caput epididymis, a short, tightly-coiled tube linking the back of the testicles to the vas deferens and participating in sperm storage.
>The ducts of vasa efferentia bind and transport sperms from the rete testis to the epididymis.
Rete Testis is a network of fragile tubules found in the testicle's hilum that transports sperm from the seminiferous tubules to the efferent ducts.
>The cauda epididymis enters the vas deferens, which ascends to the belly and loops over the urinary bladder. It also receives a duct from the seminal vesicle and opens into the urethra as the ejaculatory duct, where it participates in sperm ejaculation.
>Seminiferous tubules are found within the testes and are responsible for meiosis and the resulting formation of male gametes, namely spermatozoa.
>The whitish membrane covers the spongy chambers inside the penis (corpora cavernosa).
>The tunica albuginea aids in the trapping of blood in the corpora cavernosa, thus maintaining a penile erection.

Here is the diagram of L.S of testis

By comparing the diagram and knowing the exact location of each part of the testis, we can say that the correct option is ' A-(i), B-(iv), C-(x), D-(iii), E-(ii), F-(vi), G-(viii)'.

Note:
- During spermatogenesis, the testicles are actively developing new sperm.
- The whole procedure takes about 64 days.
- During spermatogenesis, the testicles produce millions of sperm per day — about 1,500 per second.