Question

Name two muscles of the trunk and give their origin insertion and function

Answer 1

The two muscles of the trunk are the external obliques and the rectus abdominis. The external obliques originate from the lower ribs and assist in trunk rotation. The rectus abdominis flexes the trunk and compresses the abdomen.

Step-by-step explanation:

The two muscles of the trunk are the external obliques and the rectus abdominis.

The external obliques originate from the lower ribs and insert into the linea alba, iliac crest, and pubic tubercle.

Their function is to compress the abdomen and assist in trunk rotation.

The rectus abdominis is located in the midline of the abdomen and originates from the pubic symphysis.

It inserts into the xiphoid process and costal cartilages of the ribs. Its function is to flex the trunk and compress the abdomen.

Answer 2

The two muscles of the trunk are Abdominal external oblique muscle and Abdominal internal oblique muscle. Their origin and function are in Abdominal external oblique muscle ; lower 8 costae, ligamentum iguinali, rotates torso and Abdominal internal oblique muscle; inguinal ligament, sternum & inferior ribs, compresses abdomen.