**Question:** All of the following statements regarding inguinal canal are true, EXCEPT:

A. The inguinal canal is a part of the abdominal cavity.
B. It is a fibrous structure that serves as a passage for the spermatic cord and internal spermatic vessels in males.
C. The canal extends from the inguinal ligament to the pubic symphysis.
D. It is a muscular structure present in females.

**Correct Answer:** D. The correct answer is "Option D: It is a muscular structure present in females."

**Core Concept:** The inguinal canal is a vital anatomic structure located in the abdominal wall, connecting the inguinal ligament to the pubic symphysis. It serves as a passageway for various structures, primarily in males, including the spermatic cord and internal spermatic vessels.

**Why the Correct Answer is Right:** The inguinal canal is indeed a fibrous structure in males, as it provides a passage for the aforementioned structures. In males, it plays a crucial role in the passage of the spermatic cord and internal spermatic vessels into the scrotum.

**Why Each Wrong Option is Incorrect:**

A. Claiming that the inguinal canal is a part of the abdominal cavity is incorrect. It is an anatomical structure located in the abdominal wall, not a part of the abdominal cavity itself.

B. Although the inguinal canal does facilitate the passage of the spermatic cord and internal spermatic vessels, it is still a fibrous structure, not muscular.

C. The statement about the canal extending from the inguinal ligament to the pubic symphysis is accurate, as it is indeed a connection between these two anatomical landmarks.

**Clinical Pearl:** Understanding the role of the inguinal canal is essential in clinical practice, especially for surgeons performing hernia repair procedures or urologists dealing with inguinal hernias. It is crucial to differentiate between the anatomy of the inguinal canal in males and females, as the structures involved and their functions differ significantly. In females, the inguinal canal primarily serves as a passage for the round ligament and round ligament of the uterus.