There is a connective tissue cord extending between the testis and abdominal wall known as

The correct option/answer is: spermatic cord.

Step-by-Step Explanation:

1. Understanding the Anatomy:
During male embryonic development, the testes initially develop within the abdominal cavity. Before birth, they descend through the inguinal canal into the scrotum. The structure that extends from the testis, passes through the inguinal canal, and connects it to the abdominal wall and pelvic structures is known as the spermatic cord.

2. What the Spermatic Cord Contains:
The spermatic cord is a cord-like connective tissue structure that contains vital components running to and from the testis, including:
- The ductus deferens (vas deferens) which transports sperm.
- The testicular artery and other blood vessels.
- The pampiniform plexus (a network of veins).
- Lymphatic vessels and testicular nerves.

3. Why Other Options are Incorrect:
- Gubernaculum: This is a fibrous cord that guides the descent of the testes during fetal development, but it is not the mature connective tissue cord containing the blood vessels and ducts extending from the testis to the abdominal wall in the adult anatomy.
- Mesenteric cord and testis cord: These are not the correct anatomical terms for the structure extending between the testis and the abdominal wall.