Digestive System Flashcards
Function of digestive system
Mechanical and chemical digestion of food, absorption of nutrients molecules, elimination of solid waste
Organs of the Gastrointestinal tract
Oral cavity, pharynx, esophagus, stomach, small intestine, colon
Digestive system accessory organs
Pancreas, liver, gallbladder, salivary glands
Palate
Top of oral cavity, has a bony anterior and a soft, flexible posterior
Uvula
Hanging down from soft palate, Aids in speech production and location of gag reflex
Oral cavity
Covered in a mucous membrane. Mechanically breaks up food by chewing and mixes with saliva, which contains Amalase, to digest food
Cutting teeth
Incisors and cuspids
Grinding teeth
Bicuspids and molars
Enamel
Outer covering and crown only, is the hardest substance in tooth
Dentin
Under enamel and crown and root. It’s bulk of tooth
Pulp cavity
In crown and root canals, blood vessels, nerves
Cementum and periodontal ligaments anchor root in jawbone
Deciduous teeth
Baby teeth, 20
Permanent teeth
32 adult teeth
Esophagus
Chute from oral cavity to stomach
Peristalsis
Wavelike muscular movements; can push food through esophagus
Chyme
Watery mix of food and digestive juices
Stomach parts
Fundus: upper part
Body: main section
Antrum: lower part
Rugae: Folds in stomach lining that stretch out to allow stomach to expand with food
Lower esophageal sphincter
Keeps food from backing up into esophagus
Pyloric sphincter
Allows highly acidic chyme to enter small intestine
Small intestine
Absorbs water, average is 20 feet, has 3 parts
Duodenum
First section of small intestine that starts at the pyloric sphincter and is about 10 to 12 inches long
Jejunum
Second section of small intestine about 8 feet long
Ileum
Third section about 12 feet long, connects to colon at ileocecal valve
Large intestine
Fluid that remains after digestion and absorption enters colon. Consists of ascending, transverse, descending, and sigmoid colon
Salivary glands
Saliva and food make a bolus, Saliva contains amalase which begins digestion of carbs
Three pairs of salivary gland’s
Parotid gland, sublingual gland, and submandibular
Liver
Processes nutrients and detoxifies harmful substances. Produces bile
Emulsification
Break up large fat globules into small droplets
Gallbladder
Stores bile, common bile duct carries bile to duodenum
Pancreas
Secretes digestive juices such as buffers, which neutralized acidic chyme, and enzymes that digest macromolecules
Dentistry
Branch of healthcare that treats conditions involving the teeth, jaws, and mouth
Gastroenterology
Branch of medicine involved in treating disorders of digestive system
Oral surgery
Branch of dentistry that uses surgical means to treat dental conditions
Orthodontics
Branch of dentistry concerned with correction of problems with tooth alignment
Periodontics
Branch of dentistry that treats conditions involving gums and tissues surrounding the teeth
Proctology
Branch of medicine involved in Treatment of diseases of the anus and rectum
Anorexia
Loss of appetite with other condition; different from anorexia nervosa
Aphagia
Being unable to swallow or eat
Ascites
Collection of fluid in peritoneal cavity
Bradypepsia
Having a slow digestive system
Cachexia
Loss of weight and wasting occurring during chronic disease
Cholecystalgia
Gallbladder pain
Dentalgia
Tooth pain
Dysorexia
Having an abnormal, usually diminished, appetite
Dyspepsia
Indigestion; having an upset stomach
Dysphagia
Having difficulty swallowing or eating
Emesis
Vomiting
Gastralgia
Stomach pain
Hematemesis
Vomiting blood
Hematochezia
Passing Bright red blood in stools
Hyperemesis
Excessive vomiting
Jaundice
Yellow cast to skin; caused by deposit of bile pigments; often caused by liver disease
Melena
Passage of dark tarry stool, due to digested blood
Polyphagia
Excessive eating