Meaning of ABDOMINAL MUSCLE in English

ABDOMINAL MUSCLE

Any of the muscles of the front and side walls of the abdominal cavity .

Three flat layers

the external oblique, internal oblique, and transverse abdominis muscles

extend from each side of the spine between the lower ribs and the hipbone. The abdominal muscles attach to aponeuroses, connective tissue sheaths that merge toward the midline, sheathing the rectus abdominis muscle on each side of the midline. The abdominal muscles support and protect the internal organs and take part in exhaling, coughing, urinating, defecating, childbirth, and motion of the trunk, groin, and lower limbs.

Britannica Concise Encyclopedia.      Краткая энциклопедия Британика.