In Bodies of Water. The Volga River of western Russia starts in the Valdai Hills northwest of Moscow and flows about 3,701 km (2,300 mi) generally east and south to the Caspian Sea.  The Volg â¦ a River flows in the eastward direction. 11 people found this useful.he Volga River of western Russia starts in the Valdai Hills northwest of Moscow and flows about 3,701 km (2,300 mi) generally east and south to the Caspian Sea.   The Volg â¦ a River flows in the eastward direction. 11 people found this useful.
Posterior pharyngeal pulsion (Zenker's) diverticulum: Zenker called this pulsion diverticula. Earlier foreign body impaction was attributed as a cause of this diverticulum. Killian attributed spasmodic contraction of the circular fibers at the upper end of the esophagus.efinition: Pharyngeal pouches are mainly acquired and rarely congenital diverticula in and around the pharynx and oesophagus. These diverticula are nothing but circumscribed pouches caused by a protrusion of mucosa through a preexisting weakness / opening in the muscle layers of pharynx / oesophagus.
No one knows exactly what causes diverticula, but eating a diet thatâs low in fiber is thought to contribute to the formation of the sacs. Eating fiber helps your stool stay soft, which makes them easier to pass. A diet thatâs low in fiber can cause problems such as constipation. If you have constipation, more pressure is needed to pass your stool. Doctors believe that increased pressure inside the colon can lead to the development of diverticula. Diverticulitis occurs when fecal matter lodges in the diverticula and causes an infection.