Anatomy of the abdominal muscles

As for the abdomen, it has eight muscles, and they contribute to various benefits. Benefits include assistance in squeezing excrement and urine contained in the viscera, as well as the fetus from the uterus; Another usefulness is that these muscles support the thoraco-abdominal barrier and help it during exhalation and compression of the chest; Another benefit is that the muscles warm the stomach and intestines by enveloping them.

Of these eight muscles, a pair of rectus muscles, which descend straight down from the dagger-shaped cartilage, and their fibers stretch along to the pubis, with their ends extending in the areas adjacent to the pubis. The substance of this pair of muscles is fleshy from beginning to end.

Two other muscles cross these two; they are located above a membrane that extends throughout the abdomen and under two oblongata muscles. The intersection of the fibers of these muscles with the fibers of the first of the mentioned muscles is an intersection at a right angle.

Two pairs of muscles run slightly obliquely, each on one side, right and left. Each pair consists of two muscles intersecting in a crisscross pattern; they extend from the false ribs to the pubis and from the groins to the dagger-shaped cartilage. The ends of two of these muscles meet on the right and left at the pubis, and the ends of the other two at the dagger-shaped cartilage. These pairs lie on both sides on the fleshy parts of the transverse muscles.

These pairs remain fleshy until they come into contact with the rectus muscle through wide tendons, similar to membranes. These pairs are located above the oblongata muscles, which lie above the transverse muscles.