基础医学英语课件：The digestive system and how it woks

1、The digestive system and how it woks,Esophagus 食道,General features a muscular tuber about 25 cm long, connecting the pharynx at level of C6 vertebra, passes through the diaphragm at level of T10 vertebra and after 12 cm enters the stomach Division Cervical part Thoracic part Abdominal part,返回,Stomac

2、h 胃,Location Mainly parts is situated in the left hypochondrial region Small in the epigastric region The cardia is situated to the left of T11, the pylorus lies to the right of L1 Juices produced gastric acid Functions digests protein,返回,Small instestine 小肠,About 57m long Division: Duodenum 十二指肠 Je

3、junum 空肠 Ileum 回肠,返回,Colon 结肠,Ascending colon 升结肠 (15 cm) right colic flexure 结肠右曲 Transverse colon 横结肠 (50 cm) left colic flexure 结肠左曲 Descending colon 降结肠 (25 cm) descends almost vertically from left colic flexure to sigmoid colon at left iliac crest. Sigmoid colon乙状结肠 (40 cm) extends from descend

4、ing colon to rectum at level of S3.,返回,Rectum 直肠,Position: within pelvic cavity, extends from S3 to pelvic diaphragm. Curves Sagittal plane Sacral flexure 直肠骶曲: convex backward Perineal flexure 直肠会阴曲: convex forward Coronal plane Upper and lower partconvex to the right. Middle partconvex to the left

5、. Lower part of rectum dilated, to from ampulla of rectum 直肠壶腹 Three transverse folds of rectum 直肠横襞,返回,Liver 肝,Shape two surfaces Diaphragmatic surface膈面 -Convex and smooth Visceral surface 脏面 -Has a H-shaped fissures and grooves Juices produced bile Functions dissolve the fat into the watery contents of the intestine,返回,Pancreas 胰,Shape and Position A soft yellowish lobulated gland Lies behind the peritoneum on the posterior abdominal wall, roughly at the level of L1L2 Juices produced panc