BIOL 030 Lecture Notes - Lecture 29: Stratified Squamous Epithelium, Gastric Glands, Greater Omentum
22 Dec 2020
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Document Summary
Following the oral cavity, the esophagus is the next portion of the digestive tract. It is a muscular tube, measuring 25cm in length and extending from the pharynx to the stomach. Mucosa: stratified squamous, which protects the esophagus from friction as food travels from the oral cavity to the stomach. Submucosa: contains mucus-secreting glands, which help lubricate the passage of food. Serosa or adventitia: the esophagus is covered by an adventitia. The shape of the stomach gives rise to the lesser and greater curvatures. Hanging off of the greater curvature is a structure known as the greater omentum. It is multiple layers that cover and protect the abdominal viscera. Mucosa: is folded into ridges and folds called rugae. Submucosa: contains blood vessels, lymphatics, glands, and nerve plexuses to supply the stomach tissue with oxygen and control contraction of the musculature. Serosa: the stomach is covered in serosa.
