Question

What is the anterior layer of the rectus sheath composed of above the arcuate line?

A) Only the external oblique aponeurosis

B) External and internal oblique aponeuroses

C) External oblique, internal oblique, and transversus abdominis aponeuroses

D) Transversus abdominis aponeurosis only

Answer 1

The anterior layer of the rectus sheath above the arcuate line is composed of external oblique, internal oblique, and transversus abdominis aponeuroses.

Step-by-step explanation:

The anterior layer of the rectus sheath, above the arcuate line, is composed of external oblique, internal oblique, and transversus abdominis aponeuroses. The rectus sheath is a connective tissue covering the rectus abdominis muscle, which is located in the anterior abdominal wall. The sheath is formed by the aponeuroses (flat tendons) of the three muscles.