Question

Gubernaculum cord is a contractile structure that
A. Pulls the down the testis during the breeding season into the scrotal sac.
B. Allow daily migration of the testis from the abdominal cavity into the scrotum.
C. Facilities ejaculation of spermatozoa from the testis.
D. Keep the test in the position.

Answer 1

Gubernaculum cord- A fibrous cord that extends from the caudal end of the epididymis to the scrotal wall.

Complete Answer:
Let us find the correct answer,
Option A: In mammals which breed seasonally, the testes descend into scrotum only during the breeding season, example bat and otter. Therefore, this is an incorrect answer.

Option B: Inguinal canal allows the daily migration of the testis from the abdominal cavity into the scrotum. Therefore, it is an incorrect answer.

Option C: Epididymis is a coiled structure which helps in the facilitation of ejaculation of spermatozoa from the testis. The epididymis stores the sperm temporarily. Therefore, this is an incorrect answer.

Option D: Testes are attached to the abdominal wall by the gubernaculum. The testis is pulled down by the gubernaculum into the pelvis and develops an inguinal canal. The inguinal canal is the passage through which the testes descend into the scrotum and contains the spermatic cord. Therefore, this is the correct answer.

Thus, the correct option is D) Keeps the testis in position.

Note: From each testis, 10-12 vasa efferentia confluent to form a field and coiled tube called epididymis behind the tests.
- The epididymis consists of three parts: i) Caput ii) Corpus iii) Cauda.
- From the cauda epididymis, a partially coiled tube called has deferens ascends into the abdomen through the inguinal canal, passes over the urinary bladder, the ductus deferens dilates to form ampulla, which receives behind the urinary bladder and form an ejaculatory duct.