which muscle of the abdominal region inserts at the linea alba and pubis
Linea alba (abdomen) It is formed by the fusion of the aponeuroses of the abdominal muscles, and it separates the left and right rectus abdominis muscles. In muscular individuals its presence can be seen on the skin, forming the depression between the left and right halves of a "six pack".
Short ribs The serratus ventralis muscle defines the area in the beef carcass from where short ribs come, and is the preferred muscle tissue for short ribs.[4] This muscle originates near the second rib, and covers most of the rib cage.[4][5] In the chuck area (second through fifth ribs), the muscle is much thicker. Moving toward the rump, the serratus ventralis becomes less dense, and may not cover the entire rib. Outside of the chuck, the serratus ventralis covers the entire rib with a degree of thickness only in the plate area. Over ribs nine through 12, the serratus ventralis is too thin to properly create a true short rib, and meat here is usually turned into a "Royal short rib" or else stripped from the bone and used for ground beef.[4]