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Chapter 15
Digestive System
28
Science
Not Applicable
11/20/2011

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Term
Salivary Glands
Definition
Secretes saliva, which contains enzymes that breakdown carbs.
Term
Mouth
Definition
Mechanical breakdown of food; begin chemical digestion of carbs
Term
Pharynx
Definition
Connects mouth to esophagus
Term
Esophugus
Definition
Peristalsis pushes food to stomach
Term
Stomach
Definition
Secretes acid and enzymes. Begin enzymatic digestion of proteins.
Term
Liver
Definition
Produces bile, which emulsifies fat
Term
Gallbladder
Definition
Stores bile and introduces it inot small intestine
Term
Pancreas
Definition
Produces and secretes pancreatic juice, containing digestive enzymes and bicarbonate ions, into small intestine
Term
Small Intestine
Definition
Mixes food with bile and pancreatic juice. Final enzymatic breakdown of food molecules; main site of nutrient absorption
Term
Large Intestine
Definition
Absorbs water and electrolytes to form feces.
Term
Rectum
Definition
Regulates elimination of feces
Term
Salivary Amylase
Definition
Salivary glands, begin carbohydrate digestion by breaking down starch and glycogen to disaccharides
Term
Pepsin
Definition
Gastric chief cells, begins protein digestion
Term
Pancreatic Amylase
Definition
Pancreas, Breaks down starch and glycogen into disaccharides
Term
Pancreatic Lipase
Definition
Pancreas, breaks down fats into fatty accids and glycerol
Term
Proteolytic Enzymes
Definition
Pancrease, breaks down proteins or partially digested proteins into peptides
Term
Nucleases
Definition
Pancreas, breaks down nucleic acids into nucleotides
Term
Peptidase
Definition
Intestinal mucosal cells, breakds down peptides into amino acids
Term
Sucrase, maltase, and lactase
Definition
Intestinal mucosal cells, breaks down disaccharides into monsaccharides
Term
Intestinal Lipase
Definition
Intestinal mucosal cells, breaks down fats into fatty acids and glycerol
Term
Enterokinase
Definition
Intestinal mucosal cells, converts trypsinogen into trypsin
Term
Alimentary Canal
Definition
Mouth -> Pharynx -> Esophagus -> Stomach -> Small Intestine -> Large Intestine -> Rectum and Anus
Term
Mesentery
Definition
Double layer of peritoneum that provides vascular and nerve supplies to the viscera and holds digestive organs in place and stores fat
Term
Tunics of Alimentary Canal
Definition
Mucosa, submucosa, muscular layer, and serosa.
Term
Mucosa
Definition
Secretion of mucus, absorption of end products of digestion, protect against infectious disease, secretion.
Term
Submucosa
Definition
Elastic fibers, blood and lymphatic vessels, lymph nodes and nerves. Nourish tissues and carry away absorbed materials.
Term
Muscular Layer
Definition
Responsible for segmentation and peristalsis. Circular fibers constrict tube and longitudinal fibers shorten it.
Term
Serosa
Definition
Secretes serous fluid and protects visceral peritoneum as an outer covering.
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