What is The action of rectus abdominis?

Answer 1

The rectus abdominis is the muscle that vertically extends from the 5th, 6th, and 7th ribs to the pubis. It helps the flexion of the spinal column and controls the tilt of the pelvic region. The rectus abdominis plays a key role in exercises that require bending motions and it also aids in stabilizing your upper body while performing movements with your arms and/or cephalic region.

Answer 2

Same as External Oblique which is Tenses abdominal wall and compressess abdominal contents. The Rectus abdominus also flexes vertebral column.

Answer 3

External