Digestive System 1 Flashcards
Process in which compiles foods must be taken into the GI tract
Ingestion
Process in which food is broken down into simpler molecules
Digestion
Movement of the GI tract to move food down
Motility
Digestive enzymes and other products introduced into the lumen of GI tract
Secretion
Movement through the GI mucosa into the internal environment
Absorption
Process in which the body rids waste
Elimination of feces
Hollow space within the GI tract
Lumen
Walls of the GI tract
1) mucosa (mucous membrane)
2) sub mucosa
3) muscular is
4) serosa
Difference between mucosa in esophagus and rest of GI tract
Mucosa in esophagus is made of tough, stratified sbrasion resistant epithelium and everywhere else is simple columnar
Connective tissue layer that lies just below the mucosa and contains blood vessels and nerves
Submucosa
Two layers of muscle tissue below the submucosa
Muscular is
Rhythmic wavelike contraction of the gut wall causing alternating contraction and relaxation
Peristalis
Alternating contraction of the circular later if the muscularis wishing a single region
Segmentation
Outermost membrane of the digestive tube
Serosa
Serosa also known as
Visceral peritoneum
Loops of the digestive tract are anchored to the abdominal cavity by a large double folded peritoneal tissue called
Mesentery
Phony structure in anterior portion of the mouth firemen by palatine and maxillary bones
Hard palate
Located above the posterior or rear position of the mouth
Soft palate
Hangs down from the center of the soft palate
Uvula
A thin membrane that attaches the tongue to the floor of the mouth
Frenulum
Three main parts of a tooth
Crown, neck, and root
Portion of tooth that is exposed and visible in the mouth
Crown
Three tissues that cover teeth
Enamel, dentin, and cementum
Narrow portion of tooth that connects crown and root
Neck
Mild, localized and transitory inflammation of the gums
Gingivitis
Part of the tooth that fits into the bony socket
Root
Lines each bony socket of the tooth and anchors tooth to bone
Periodontal membrane
Tooth decay
Dental caries
Dental caries results in
Cavity
1 cause of tooth loss
Periodontitis
Set of 20 baby teeth
Deciduous
How many permanent teeth are there
32
Malalignment if the teeth
Malocclusion
Effective chewing
Mastication
Three pairs of salivary glands
Parities, submabdibulars, sublinguals
Salivary glands that are thin, watery and free of mucus
Serous
Serous type saliva has
Salivary amylase
Largest saluvary gland that lie just below and in front of each ear at the angle of the jaw
Parotid gland
Glands located below the mandibulat angle and about the size of a walnut. Produce both serous and mucus cells
Submandibular gland
Produce only mucous tour saliva and lie under the tongue
Sublingual glands
Swallowing of food
Deglutition
Principle structure of the digestive system
Alimentary canal or gastrointestinal tract
