Abdominal fascia includes superficial fascia, deep fascia and intra-abdominal fascia.

1, the superficial fascia is one layer in the upper abdomen, and it is divided into shallow and deep layers below the navel. The superficial layer contains fat, called the deep layer of Kanpa fascia, and contains elastic fibers, called Scappa fascia, which continue downward with the fascia lata of thigh and inward downward with the superficial fascia of perineum and scrotum.

2. The deep fascia can be divided into several layers, covering the superficial and deep layers of the muscles of the anterolateral group respectively.

Rectus abdominis:

Located on both sides of the midline of the anterior abdominal wall, in the sheath of rectus abdominis, the upper part is wide and the lower part is narrow, starting from the pubic symphysis and pubic protuberance, and the muscle bundle ends in front of the sternal xiphoid process and the 5 th and 7 th costal cartilage.

The whole length of the muscle is divided into several muscle ventrals by 3 or 4 transverse tendons. The tendon is closely combined with the anterior layer of rectus abdominis sheath, but the tendon behind rectus abdominis muscle is not obvious and does not heal with the posterior layer of rectus abdominis sheath, so the rectus abdominis muscle is free behind.

The role of anterolateral abdominal muscles is to protect abdominal organs and maintain intra-abdominal pressure; Participate in the completion of defecation, childbirth, vomiting and cough and other physiological functions; It can also lower the ribs to help exhale, and it can also make the spine bend forward, bend sideways and rotate.

Baidu encyclopedia-abdominal muscles