The Digestive Tract
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In the last lab, we observed
the esophagus running dorsal to the trachea through the neck and within
the mediastinum of the thoracic cavity. This lab we will start with the stomach and
continue our way down the digestive tract. Remember, the head is to the left, and
because we are looking at these specimens from a ventral view, the left side of the
specimen will be up (the spleen * is always on the left side)
and the right side will be down.
The body of the stomach lies mostly on the left of the midline. The fundus (approximately A) lies cranial to where the esophagus enters the stomach. The pylorus (B) is the narrowing portion just before becoming the duodenum (C is the cranial flexure of the duodenum; D is the descending duodenum). You can see that I tucked the greater omentum (E) up near its attachment to the greater curvature of the stomach (F). You may be able to visualize another portion of mesentary that attaches the lesser curvature of the stomach (G) to the liver (H). This is the lesser omentum (I).