Digestive glands Major salivary glands Liver ·Pancreas Function:Ingestion-selective intake of food. Digestion -mechanical and chemical breakdown of food into a form the body can use. Absorption-uptake of nutrients into blood and lymph. Compaction-absorption of water and consolidation of wastes into fecal mass. Defecation the elimination of the fecal mass
Digestive glands • Major salivary glands • Liver • Pancreas Function: Ingestion - selective intake of food. Digestion – mechanical and chemical breakdown of food into a form the body can use. Absorption – uptake of nutrients into blood and lymph. Compaction – absorption of water and consolidation of wastes into fecal mass. Defecation – the elimination of the fecal mass
Esophagus 告n慧舌chooephalicous position and division three parts: Cervical parts:5cm; Thoracic parts:18-20 cm; Abdominal parts only 1-2cm 3 constrictions of the esophagus: narrows position distance from middle inscior first beginning 15cm second in front of left branchus 25cm third esophageal hiatus 40cm
7 （position and division 3 constrictions of the esophagus: narrows position distance from middle inscior first beginning 15cm second in front of left branchus 25cm third esophageal hiatus 40cm three parts: Cervical parts：5cm; Thoracic parts: 18-20 cm; Abdominal parts : only 1-2cm. : Esophagus
II.Three constrictions beginning,lies at level of C6,the narrowest part crossed by left main bronchus, 25cm from incisors,lies at level of intervertebral disc between T4 and T5. passes through the esophageal hiatus of diaphragm,40cm from incisors,at level of T10 Carcinoma of esophagus
Ⅱ. Three constrictions beginning, lies at level of C6, the narrowest part crossed by left main bronchus, 25cm from incisors, lies at level of intervertebral disc between T4 and T5. passes through the esophageal hiatus of diaphragm, 40cm from incisors, at level of T10 Carcinoma of esophagus
stomach Shape: Location: digestion gastric juice-chyme Peristalsis Enzymatic digestion PH:2 ol muce ur)
stomach Shape: Location: digestion gastric juice---chyme Peristalsis Enzymatic digestion PH: 2
Peristaltic movement Esophagus Relaxed muscularis Circular muscles contract Lower Longitudinal muscles esophageal contract sphincter Relaxed muscularis ring-like movements Bolus of esophagus- contracting then Stomach relaxing to move food downward. Z-line:at the junction Anterior view of frontal sections peristalsis in esophagus 24.10
Peristaltic movement ring-like movements of esophagus - contracting then relaxing to move food downward. Z-line: at the junction