Inferior umbilicus

The feather shaft consist of two parts (Figure 6.9). The hollow lower part below the vane, which attaches to the bird s skin, is the calamus. At the base of this hollow tube is an opening called the inferior umbilicus. This is the passage through which blood vessels feed the growing feather. When the feather reaches maturity, this opening dries up and closes off. The solid upper part of the feather, from which the vanes grow, is the rachis. 

The liver is covered with an anterior reflection of the peritoneum known as Ghsson s capsule. Other extensions of the peritoneum form ligaments that hold the Hver in place. Internal extensions of the capsule provide an internal supporting framework that divides the liver into lobules and ultimately surrounds blood vessels and nerves. One of the ligaments, the ligamentum teres, is the vestigial remnant of the umbilical vein and connects the umbilicus to the inferior border of the liver. When portal hypertension occurs, the umbilical veins may reopen, leading to venous dilation around the umbilicus (termed caput medusae). 

The abdominal L2 tender point is an additional tender point for the second lumbar vertebra and is found 2 inches lateral to the umbilicus. The treatment is the same as for the anterior inferior iliac spine tender point except that the thighs are rotated toward the tender point (the equivalent of rotation away from the tender point at the vertebral level) (Fig. 50-4). 

Pseudoexstrophy of the Bladder 178 Covered Exstrophy of the Bladder 180 Superior Vesical Fissure 180 Inferior Vesical Fissure 180 Duplicate Exstrophy 180 Bladder Exstrophy with Normal Umbilicus and Normal Infraumbilical Wall 180 OEIS Complex 180 Cloacal Exstrophy (Vesicointestinal Fissure) 180 Urogenital and Intestinal Features 180 Musculoskeletal Features 180... 

---