Because we expose our feet to potential injury in our daily lives by walking, we have all experienced pains in the feet at one time or another. There are many common causes of foot pains, such as blisters and corns. There are also less common causes of foot pain, such as sciatica and osteomyelitis.
The trachea, or windpipe (figs. 21-1 and 21-2), which has cervical and thoracic parts, extends from the inferior end of the larynx (C6 vertebra) to its point of bifurcation (between T5 and 7 vertebral level). It is about 9 to 15 cm in length. The trachea descends anterior to the esophagus, enters the superior mediastinum, and divides into right and left main bronchi. The trachea is a median structure but, near its lower end, deviates slightly to the right, resulting in the left main bronchus crossing anterior to the esophagus. Owing to the translucency of the air within it, the trachea is usually visible above the arch of the aorta in radiographs.
The stomach has four parts 1  : Cardia This is the area where the esophagus meets with the stomach â esophagogastric junction (Z-line). 2  Fundus This is the uppermost area of the stomach that lies just under the diaphragm. 3  Body This is the largest part of the stomach between the fundus and pylorus. Pylorus This is the area through which the gastric contents flow out of the stomach and into the duodenum. It is divided into the pyloric antrum which lies next to the body and the pyloric canal which lies next to the duodenum. The passage of food from the stomach into the duodenum is regulated by the pyloric sphincter. Stomach Position