Question

Protective layer around testes is
A. Tunica adventitia
B. Tunica vasculosa
C. Tunica media
D. Tunica albuginea

Answer 1

Testes or testicles are also known as gonads, are oval –shaped male reproductive glands which are present in the sac of skin called scrotum. Testes get their ovular shape from tissues known as lobules. Testes are connected to the abdomen by spermatic cords, and attached to scrotum by testicular ligaments.

Complete answer:
Testes are the primary male sex organ in human which is 4-5cm in length and 2-3cm in width. Testes in male are corresponding to the female ovaries. Testes produce hormones known as androgens or testosterone and also produce and store sperms. Testosterone hormone is responsible for fertility, sex drive, development of bone mass and muscles. The functions of testes are controlled by anterior pituitary gland (adenohypophysis). The testes are surrounded by several layers of tissue, such as Tunica vasculosa, Tunica albuginea, Tunica vaginalis.

Tunica vasculosa layer surrounds the tubular interior of each testicle and it is the first thin layer of blood vessels.
Tunica albuginea is the next layer made up of densely packed fibres and it is a thick and protective layer which protects the testicles.
Tunica vaginalisv is the outermost layer of tissue.
Tunica adventitia and Tunica media are not testes tissue layers. These both are the layers of the coronary artery. Tunica adventitia is the outer layer of the blood vessel wall and Tunica media is the middle layer.

So, the correct option is D- Tunica albuginea.

Note:
The left testicle is bigger than the right one, and so the left vein is longer than the right one and due to this left vein subjects to more difficulties during ejaculation. Sometimes poor drainage can also cause pathological conditions such as testicular swelling and pain. On an average approx 200,000 sperms testes can make per minute.