Anatomy - Abdomen

The chamber enclosed by the abdominal wall contains a single large peritoneal cavity, which freely communicates with the pelvic cavity.

The ___________ houses major elements of the gastrointestinal system, as well as the spleen and parts of the urinary system.

Material can be expelled from the airway by forced expiration using the __________ muscles, as in coughing or sneezing.

Lateral parts of the abdominal wall are predominantly formed by three layers of muscles, which are similar in orientation to the intercostal muscles of the _______ abdominis,  _______ oblique, and ________ oblique. 

Anteriorly, a segmented muscle (the rectus abdominis) on each side spans the distance between the inferior thoracic wall and the pelvis.