The =obliquus abdominis externus= is somewhat thinner and has a less
extensive origin, which begins at the lower part of the fifth
intercostal space and ends on the last rib above its middle. The
direction of the fibers in the flank is horizontal, and they do not
reach to the external angle of the ilium, nor as high as the lumbar
transverse processes. (In this region the abdominal tunic has a strong
attachment to the point of the hip and the lumbo-dorsal fascia.) The
aponeurosis is intimately united with the abdominal tunic, and does not
detach a layer on the inner surface of the thigh.
[Illustration: