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1 DUODENUM. Initial segment of the small intestine, about 25-30 mm long, between the pylorus and the duodenojejunal flexure. A

2 Superior part. Pars superior. Horizontal beginning part ofthe duodenum. A

3 Ampulla [bulbus duodeni]. Functional dilatation at the beginning of the duodenum. It is briefly visible in radiograms. A

4 Descending part. Pars descendens. Lateral, vertical segment. A

5 Horizontal (inferior) part. Pars horizontalis (inferior). Horizontal segment below the head of the pancreas. A

6 Ascending part. Pars ascendens. Segment of duodenum lying to the left of the head of the pancreas and ascending up to the duodenoje-junal flexure. A

7 Superior duodenal flexure. Flexura duodeni superior. Flexure between the superior and horizontal parts of the duodenum medial to the gallbladder. A

8 Inferior duodenal flexure. Flexura duodeni inferior. Flexure between the descending and horizontal parts of the duodenum. A

9 Duodenojejunal flexure. Flexura duodenoje-junalis. Flexure between the duodenum and jejunum. A

10 Suspensory muscle of duodenum. M. suspen-sorius duodeni. Bundle ofsmooth muscle which attaches the duodenojejunal flexure to the diaphragm or to the celiac trunk. A

11 Longitudinal folds of duodenum. Plicae longitudinales duodeni. Longitudinal mucosal folds on the left side of the posterior wall of the descending part of the duodenum produced by the pancreatic and bile ducts. A

12 Greater duodenal papilla. Papilla duodeni major. Elevation at the end of the longitudinal fold at the openings of the common bile duct and pancreatic duct. A

13 Lesser duodenal papilla. Papilla duodeni minor. Elevation located superior to the greater duodenal papilla, usually at the opening of the accessory pancreatic duct. A

14 Duodenal glands [[Brunner's glands]]. Glan-dulae duodenales. Mucous glands located predominantly in the submucosa of the duodenum.

15 JEJUNUM. Middle segment of the small intestine. It extends about 2.5 meters from the duodenojejunal flexure. A C

16 ILEUM. Terminal segment of small intestine, about 3.5 mm long. C

17 LARGE INTESTINE. Intestinum crassum. About 1.5-1.8 m long; it extends from the cecum to the anus and consists of tenia, haustra and appendices epiploicae.

18 CECUM. Caecum. Initial portion of the large intestine, ca. 7 cm long, located below the opening of the ileum. C D

Feneis, Pocket Atlas of Human Anatomy © 2000 Thieme

19 Ileocecal valve. Valva ileocaecalis (Valva ilealis). Two-lipped valve at the entrance of the ileum into the large intestine. D

19 a Papilla ilealis. B

20 Opening of ileocecal valve. Ostium valvae ilealis. Transverse, slitlike aperture of ileum at entrance into the large intestine in the cadaver. D

21 Frenulum valvae ilealis. Fold formed by the union of the lips of the ileocecal valve. B D

21 a Ostium papillae ilealis. B

22 Vermiform appendix. Appendix vermiformis. Appendage of the cecum, usually 9 cm long, with abundant lymphatic tissue. B C D Ostium appendicis vermiformis. Opening of vermiform appendix into the cecum. D Aggregated lymphatic nodules of vermiform appendix. Folliculi lymphatici aggregati appendicis vermiformis. Lymphatic tissue within the wall of the appendix. COLON. Portion of large intestine extending from the ileocecal valve to the rectum. Ascending colon. Colon ascendens. Segment of large intestine ascending retroperitoneally on the right side. C

Right colic flexure. Flexura coli dextra. Flexure between the ascending and transverse colon. C Transverse colon. Colon transversum. Transverse segment of large intestine situated in-traperitoneally between the right and left colic flexures. C

Left colic flexure. Flexura coli sinistra. Flexure between the transverse and descending colon below the left subphrenic space. In its vicinity lies Cannon-Bohm's ring, the boundary between the cranial (vagus nerve) and sacral para-sympathetics. C

Descending colon. Colon descendens. Segment of large intestine extending retroperitoneally on the left side between the left colic flexure and sigmoid colon. C

Sigmoid colon. Colon sigmoideum. Portion of colon lying intraperitoneally between the descending colon and the rectum. C Semilunar folds of colon. Plicae semilunares coli. Crescentic contraction folds between two haustra comprising all layers of the intestinal wall. C D

Haustra (sacculationes) coli. Outpocketings between two semilunar folds. C D Appendices epiploicae (omentales). Serosa-covered appendages containing adipose tissue, located on the free and omental tenia. C

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