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1 DIGESTIVE TRACT (ALIMENTARY CANAL).

[[ Canalis alimentarius]].

2 ESOPHAGUS. Oesophagus. 23-26 cm long passage extending from below the cricoid cartilage at the level of C6 to the cardiac part of the stomach. A B

3 Cervical part. Pars cervicalis. The segment of the esophagus situated in front of the cervical vertebral column (from C6-T1). A

4 Thoracic part. Pars thoracica. The portion of the esophagus extending from T1 to the passageway through the diaphragm (about T11). A

5 Abdominal part. Pars abdominalis. The short esophageal segment between the diaphragm and the stomach. A

6 Tunica adventitia. Loose connective tissue investment which binds the esophagus to the surrounding tissues and permits its movement. C

7 Tunica muscularis. Two layers of muscle, inner circular and outer longitudinal, occupying the esophageal wall and consisting of skeletal muscle in the upper third, smooth muscle in the lower third. C

8 Crlcoesophageal tendon. Tendo cricoe-sophageus. Tendon that attaches the longitudinal muscle fibers of the esophagus to the posterior wall of the cricoid cartilage. B

9 Bronchoesophageal muscle. M. bronchoe-sophageus. Smooth muscle fibers from the left main bronchus to the esophagus. B

10 Pleuroesophageal muscle. M. pleuroe-sophageus. Smooth muscle tract between the esophagus and the left mediastinal pleura. B

11 Tela submucosa. Movable layer between the muscularis and mucosa consisting predominantly of collagenous connective tissue with blood vessels, nerves and glands. C

12 Tunica mucosa. Mucous membrane lining of the esophagus consisting of stratified, nonker-atinized squamous epithelium, lamina propria (connective tissue) and muscularis mucosae. C

13 Lamina muscularis mucosae. Distinct layer of smooth muscle between the submucosa and lamina propria. C

14 Esophageal glands. Gll. esophageae. Discrete mixed glands scattered throughout the submu-cosa. C

15 STOMACH. Gaster(Ventriculus). It extends from the end of the esophagus to the pylorus. A D

16 Anterior surface of stomach. Paries anterior D

17 Posterior surface of stomach. Paries posterior.

18 Greater curvature of stomach. Curvatura gastrica (ventricularis) major. Large curvature of the stomach profile directed toward the left and downward. D

19 Lesser curvature of stomach. Curvatura gastrica (ventricularis) minor. Small curvature of stomach directed toward the right and upward. D

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