Digestive System Flashcards
Also called the mouth
Oral cavity
Formed by the palatine bones and the maxillae
Hard palate
Lies posterior to the hard palate
Soft palate
Upper and lower lips
Superior and inferior labia
Connects labia to the gum
Labial frenulum
Space between cheeks and teeth
Vestibule
Moves food and contains taste buds
Tongue
Projections on the tongue that contain taste buds
Papillae
Probide friction to move objects with tongue
Filiform papillae
Small and contain only about 5 taste buds
Fungiform papillae
Larger and contains up to 100 taste buds
Circumvallate papillae
Connects the tongue to the bottom of the oral cavity
Lingual frenulum
Produces mucin and salivary amylase
salivary glands
Large glands near mandibular ramus that is frequently attacked by the mumps virus.
Parotid glands
Also called Stenson’s ducts.
Parotid ducts
Located on the floor of the oral cavity near the mandible
Submandibular glands
Also called Wharton’s ducts
Submandibular ducts
Located on flood of oral cavity
Sublingual glands
Also called Rivinus ducts
Sublingual ducts
First teeth, and there are normally 20. Baby teeth.
Deciduous teeth
How many permanent teeth do you have?
32
Exposed portion of tooth above the gum line
Crown
Base of tooth that fits in a socket in the mandible or maxilla
Root
Between the crown and the root
Neck
Mineral component, which is similar to bone in chemical composition, but lacks cells
Dentin
Interior chamber in the crown that contains cells, nerves, and blood vessels
Pulp cavity
Extensions of the pulp cavity into the root
Root canal
Opening through which blood vessels and nerves enter the root canal
Apical foramen
Protective layer that covers the dentin of the crown
Enamel
Protective layer that covers the dentin of the root
Cementum
Gums which surround the teeth
Gingivae
Ligament that attaches dentin of root to bone
Periodontal ligament
Blade like teeth that have 1 root.
Incisors
Sharp teeth with pointed tips that have 1 root.
Cuspids (Canines)
Teeth with flat crowns that are used to crush and grind food and have 1-2 roots
Bicuspids (premolars)
Teeth with large flat crowns and have 3 or more roots, including the wisdom teeth.
Molars
Mucous membrane that lines the digestive tract
Mucosa
Layer of the dense irregular connective tissue that has blood bessels and nerves
Submucosa
Two layers of smooth muscle
Muscularis externa
Part of the visceral peritoneum
Serosa
Is not covered by serosa
Esophagus
Structure of the wall of the digestive track
- Mucosa
- Submucosa
- Muscularis externa
- Serosa
Secrete HCI and intrinsic factor
Parietal cells
Secrete pepsinogen
Chief cells
Secrete gastrin and other hormones
G cells
Secrete mucus
Mucous cells (Goblet cells)
Produce digestive enzymes
Pancreatic acini
Delivers secretions to duodenum
Pancreatic duct
Also called duct of Wirsung
Pancreatic duct
Also called duct of Santorini
Accessory Pancreatic duct
Lobes of the liver
- Right
- Left
- Caudate
- Quadrate
Marks the division of the right and left loves of the liver
Falciform ligament
Collect bile from liver.
Right and left hepatic ducts
Combination of right and left hepatic ducts
Common hepatic duct
Connects the gallbladder to the common bile duct
Cystic duct (Ducts of gallbladder)
Formed by union of the cystic duct and the common hepatic duct
Common bile duct
Shortest section of the small intestine closest to the stomach
Duodenum
Middle section of the small intestine
Jejunum
Longest section of the small intestine that is closest to the large intestine.
Ileum
Permanent folds that increase surface area in the small intestine
Plicae circulares (Circular folds)
Finger like projections in the small intestine
Villi
Lymphatic capillaries that absorb and transport fatty acids
Lacteals
Secrete digestive enzymes
Intestinal glands
Protect the small intestine from bacteria in the large intestine
Aggregated lymphoid nodules
Also called Peyers Patches
Aggregated lymphoid nodules
Valve between the small intestine and the large intestine.
Ileocecal valve
First and smallest part of the large intestines
Cecum
Worm shaped sac
Vermiform appendix
Smooth muscle that produces haustra
Taeniae coli
Folds in walls of the large intestine that allow for expansion
Haustra
Sections o the colon
- Ascending
- Transverse
- Descending
- Sigmoid
Colic flexures
- Right colic flexure
- Left colic flexure
- Sigmoid flexure
Last 6 inches of the large intestines that stores feces
Rectum
Anal sphincters
- Internal anal sphincter
- External anal sphincter