October 25, 2014. Ranking the greatest battleships of all time is a tad easier than ranking naval battles. Both involve comparing apples with oranges. But at least taking the measure of individual men-of-war involves comparing one apple with one orange.
This lumpy appearance results in the rectus abdominis muscles being referred to as the âsix-pack.â. The name rectus abdominis comes from the Latin words for âstraightâ and âabdominal,â indicating that its fibers run in a straight vertical line through the abdominal region of the body.... Click to read more below.
1 Rectus abdominis muscle: originates from the 5th to 7th costal cartilage and the xiphoid process of the sternum and inserts at the pubis (between the pubic tubercle and symphysis). 2  Thereby it passes through the rectus sheath, a tendinous muscle envelope built by the aponeurosis of the lateral abdominal muscles.n particular, the rectus abdominis muscle does a ventral flexion (flexion of the trunk or erection of the pelvis) and thus is an important antagonist of the intrinsic back muscles.