The elastic tissue which connects the cauda epididymis to the scrotal sac is

The correct option is Gubernaculum.

To understand why this is the correct answer, let us break down the anatomical structures and their connections:
1. The Epididymis: The epididymis is a coiled tube attached to the back of each testis. It consists of three parts: the head (caput epididymis), the body (corpus epididymis), and the tail (cauda epididymis).
2. The Scrotum: The scrotum is the external pouch of skin that contains the testes.
3. Anatomical Anchor: During embryonic development, the testes descend from the abdominal cavity into the scrotum. The gubernaculum (also referred to as the scrotal ligament in adults, though gubernaculum is the primary embryonic/anatomical term for this connecting cord of elastic and fibrous tissue) is the structure responsible for guiding and anchoring the testes. Specifically, it connects the cauda epididymis (the tail portion of the epididymis) and the testis to the bottom of the scrotal sac, securing them in place.
4. Evaluating the Options:
- Caput epididymis: This is the head region of the epididymis, located at the upper pole of the testis, not a connecting tissue to the scrotum.
- Scrotal ligament: While the scrotal ligament is the adult remnant of the gubernaculum, the term "Gubernaculum" is the classic biological and anatomical answer standardly taught for the elastic, fibrous cord mediating this connection.
- Tendinous cord: These are typically structural cords found in other anatomical areas (like the chordae tendineae in the heart) and do not connect the epididymis to the scrotum.

Therefore, the elastic tissue connecting the cauda epididymis to the scrotal wall is the Gubernaculum.