Digestive System Flashcards
Digestive tract (mouth, esophagus, stomach, small intestine, large intestine)
Alimentary canal
Process of breaking down good so it can be absorbed into the bloodstream
Digestion
Liver, gall bladder, pancreas, salivary glands
Accessory organs
Inner most layer of alimentary canal
Mucous
Contains blood vessels and nerves
Submucosa
Pushes food
Muscular
Outer protection layer reduces friction
Serous
Name 3 functions of mucous layer
Secretes mucous
Releases enzymes
Absorbs
Name 2 functions of sub mucosa layer
1) transports materials from digestive canal to blood
2) give nutrients to other layers
Breaks down food
Mouth
Area inside the teeth
Oral cavity
Area between teeth and gumline
Vestibule
Front of root of mouth
Hard palate
Back of roof of mouth
Soft palate
Projection of soft palate that hangs down In back of throat
Uvula
Lymphatic tissue that fights infection in back of throat
Tonsils
Process of chewing
Mastication
Main component of teeth
Dentin
Center of tooth
Pulp cavity
Narrow tunnel that blood vessels and nerves run through
Root canal
Base of tooth
Root
Connect teeth to jaw
Peridontal ligament
Connects tooth to gum
Cementum
Cavities
Caries
Visible part of tooth
Crown
Infection of the gum
Gingivitis
Covering of tooth
Enamel
Cut teeth, front, 8
Incisors
Tear food, 4
Cuspids
Crush food, 8
Premolars
Grind, 12
Molars
Name 5 functions of salivary gland
1) moisten food
2) binds food together
3) starts digestion
4) cleans mouth
5) regulates pH
Found in cheeks 25% of saliva
Parotid
Found in lower jaw 70% of saliva
Submandibular
Found under the tongue 5% of saliva
Sublingual
Breaks down starch
Amylase
Liquefy and lower acidity
Mucous
Viral infection of the salivary glands
Mumps
Digests fats
Lipase
Increase saliva releases
Parasympathetic
Decreases saliva release
Sympathetic
Common pathway for air, water, an food that connects mouth to esophagus
Pharynx
5 steps of swallowing
1) tongue goes up
2) soft palate goes up
3) food is pushed back
4) larynx rises
5) epiglottis covers trachea
Tube that conducts mouth to stomach
Esophagus
Area over esophagus
Cardiac region of stomach
Overflow area In upper part of stomach
Fundic region
Area near duodenum
Pyloric region of stomach
Base of stomach where acids are released
Body
Material that leaves stomach
Chyme
Valve between esophagus and stomach
Cardiac sphincter
Valve between stomach and duodenum
Pyloric sphincter
First 6 inches of the small intestine
Duodenum
Creates enzymes to break down sugars, proteins, and starches
Pancreas
Secretes Insulin
Endocrine
Secretes pancreatic juice
Exocrine
Creates bile largest internal organ
Liver
6 functions of liver
1) breaks down fats
2) secrets bile
3) detoxifies blood
4) breaks down protein
5) breaks down carbs
6) stores vitamins
Stores extra bile
Gall bladder
8 feet long part of small intestine, most absorption occurs here
Jejunum
Last 12 feet of small intestine, connects to colon
Ileum
Opening in intestine that food moves through
Lumen
Folds in intestine
Plicae
absorbs water and some minerals
Large intestine
Amount of heat needed to raise 1 g of water 1 degree Celsius
calorie
1000 calories
Calorie
Name 6 nutrients and what they do
1) water-needed for chemical reactions
2) carbs- give energy
3) fats- protect, insulate, store energy
4) proteins- growth repair transport
5) vitamins- Control cell processes
6) minerals- help build tissue
Raw materials for bodily functions and processes
Nutrients