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35 Cards in this Set

  • Front
  • Back

GI tract

Mouth pharynx esophagus stomach small intestine

Accessory organs

Salivary glands liver pancreas gallbladder

Ingestion

Taking food into the mouth

Secretion

Releasing water acid buffers and enzymes into the Lumen of the GI tract

Digestion

Breaking down food

Absorption

Passing digested products from the GI tract into the blood and lymph

peritoneum

The membrane that covers the abdominal organs and lines abdominal cavity

Greater omentum

Drapes over the intestine like a fatty

mesentry

part of the peritoneum that binds the small intestine to the abdominal wall

Submucosa

Connective tissue that binds mucosa to muclaris

Mucosa

Interlining or digestive tract

Muscularis

Thick layers of muscle mostly smooth muscle and parts skeletal in esophagus and anal sphincter muscles

Serosa

Outermost layer which consists connective tissue

Enteric nervous system

Control the secretions of the organs of the GI tract

Salivary amylase

Begins digestion of starch

Mucus

Lubricates food

Bolus

Tongue moves food too contact the teeth and helped shape food

Deglutition voluntary stage

Tongue shapes food

Deglutition pharyngeal stage

Tongue Rises against the palate and closes the nasopharynx

Deglutition esophageal stage

Pushes the bolus dow

Gastric juices

Composed of mucus hydrochloric acid and digestive enzymes

chyme

peristaltic contractions from the Fundus to the pylorus of the stomach mix gastric juices

Pepsin

Hydrochloric acid secreted into the chyme kills bacteria and activates

Gastric lipase

Quantity of lipids

Gastric emptying

Stomach empties its contents into the small intestine

Villi

Projections of the intestinal mucosa cells containing connective tissue blood vessels and lymphatic vessels that function in the absorption of the products of digestion

Small intestine


jujenum


illum


duodenumjujenumillumWater soluble substances absorbed through the epithelial lining go into blood vessel fat soluble substances proceed into lymph vessels called lacteals and eventually make their way to the blood circulation

Bile salts

Break down large lipids emulsification

Gallbladder

Stores bile and releases it into the duodenum of the small intestine through the common bile duct when stimulated by cck

Pancreatic amylase

Breaks down starches

tryipsin chymotropin

Bridgestone proteins into amino acids

Pancreatic lipase

Breaks down triglycerides into fatty acids

Small intestine

Cells on the Villi of the small intestine absorb various molecules facilitated diffusion as well as active diffusion and the nature of the absorb substance passes are there into the blood in hepatic portal circulation or into the lacteal and lymphatic system

Gastrin

Stimulates secretion of gastric juice increases mortality of GI tract and relaxes pylanc sphincter

Intestinal mucosa

Stimulates secretion of pancreatic juice rich in bicarbonate ions