The =abdominal tunic= is little developed.
The =obliquus abdominis externus= has an extensive fleshy portion and a
correspondingly narrow aponeurosis; the latter does not detach a femoral
lamina, but is reflected in toto to form the inguinal (Poupart’s)
ligament.
The =obliquus abdominis internus= resembles that of the ox; a small
fusiform muscle, which crosses the inguinal canal obliquely and is
attached on the abdominal surface of the inguinal ligament, is
apparently a detached slip of the internal oblique.
The =rectus abdominis= is extensive and thick. It has seven to ten
intersections. Its tendon of insertion fuses largely with the common
tendon of the gracilis, and does not give off an accessory band to the
head of the femur.
The fleshy part of the =transversus abdominis= is well developed. It
blends in front with the transversus thoracis.
The =cremaster externus= is present in the female as well as in the
male.