Digestive System
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Structure of Digestion System “My Parents Exerpienced Selling Some Large Rats”
Mouth Pharynx Esophagus Stomach Small Intestine Large instestine Rectum All are organs
Allmentary Canal
Also known as GI tract or gut
Accessory Digestive glands
Teeth Toung Gallbladder Digestion gland
Digestion gland
Produces secretion that help break down foodstuffs
Types of Digestion gland
Pancrease Salivary gland Liver
Small Intestine
Extend from plyoric sphincter to ileocecal Microvilli - enzymes are embedded Duodenum - shortest segment jejunum -main site of absorption ileum - narrowest in diameter
Large intestine
• Specialized of Vitamin K biotin, sodium ions, chloride ions and water • Cecum - Large intestine is a pouch • colon - middle portion, divided into ascending colon. transverse, • rectum - opens anus • anal canal - last portion of rectum, involuntary internal and voluntary exertnal sphincter
CCK - Cholecystokinin
produced in the small intestine stimulates the release of enzymes from pancreas and the bile from the liver
Gastrin
Produced in the stomach and stimulates acid
Secretin
produced in the small intestine Stimulates the production of bicarbonate by the pancreas
Insulin
produced in the pancreas regulates blood sugar level
Glucagon
Produced in the pancreas Helps release glucose from the liver
Bile
Produced by the liver and stopped in the gallbladdar. Yellow-green solution bile salts pigment cholestorol and electrolytes helps break down fat in small intestine Enhances fat-soluble Vitamin A, D, E, and K Stored and concentrated in gallbladdar
Peritoneum
serous membrane of abdominal cavity that consist 2 peritoneum membrane
Visceral peritoneum
membrane on the external surface of most digestive organs
Parietal peritoneum
membrane line body wall
Peritoneal cavity
Fluid filled space between two peritoneum fluid lubricates most organs
Mesentery
doubled layer of peritoneum provided routes for blood vessls, lymphatic, and nerves
Interperitonuem organs
organs that are located within the peritoneum
Retroperitoneal organs
located outside posterior to the peritoneum
Submucosa
areolar connective tissue, has abundant amount of elastic tissue that helps organs to regain shape after strong large meal
Muscularis external
Muscle layer responsible for segmentation and peristalisis
Serosa
Outmost layer which is made up visceral peritoneum
Peristalis
Moves food from the pharynx to the esophogus to the stomach Involuntary process