Chapter 14 reverse Flashcards
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Salivory glands
liver
gall bladder
pancreas
Accessory organs of the digestive system
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The Tube (24’ long)
mouth
pharynx
esophagus
stomach
small intestine
large intestine
rectum
anus
Alimentary Canal
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lips
cheeks
hard palate
Soft palate
Uvula
Vestibule
oral cavity
tongue
tonsils
Mouth
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protect the anterior opening of the mouth
lips
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form the lateral wall of mouth
cheeks
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forms anterior roof of mouth
maxilla and palantine bones
hard palate
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muscle arch
forms posterior roof of mouth
soft palate
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fleshy projection from soft palate
prevents food from entering the nasal cavity during swallowing
uvula
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space between lips and teeth and gums
vestibule
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area contained by the teeth
oral cavity
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attached at the hyoid bone and styloid processes of the skull
lingual frenulum anchors the tonge to floor of mouth
tongue
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Palatine tonsils: on either side of tongue
Lingual Tonsils: posterior of tongue
tonsils
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mastication (chewing)
mixing food with saliva forms bolus
initiation of swallowing by the tongue
allows for the sense of taste
Mouth Physiology
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Nasopharynx: NOT part of digestive system
Oropharynx: posterior to oral cavity
Laryngopharynx: Below the oropharynx and connected to the esophagus
Pharynx Anatomy
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collapsible muscle tube that propels food into stomach
about 10” long
runs from pharynx to stomach
conducts food by peristalsis (slow rhythmic squeezing)
Esophagus
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located on left side of abdomen cavity
food enters cardioesophageal sphincter
food empties in the small intestine at the pyloric sphincter (valve)
Stomach anatomy
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mucosa
mucous neck cells
gastric glands
chief cells
parietal cells
Stomach Mucosa
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inntermost layer is simple columnar epithelium
Mucosa
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produce sticky alkaline mucus
mucous neck glands
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situated in gastric pits
secrete gastric juices
gastric glands
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produce protein digesting enzyme pepsinogen
Cheif cells
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produce hydrochloric acid and intrinsic factor
parietal cells
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temporary storage tank for food
site of food breakdown
chemical breakdown of protein begins
delivers chyme (foodmixed with gastric juice) to small intestine
Stomach physiology
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muscular tube extending from the pyloric sphincter to ileocecal valve
3 portions: duodenum, jeunum, ileum
mesentery
Small intestine
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suspends the small intesting from the posterior abdominal wall
mesentery
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completes digestion and absorption of nutrients
Function of small intestine
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attached to stomach
curves around the head of the pancreas
Duodenum
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body of small intestine
jejunum
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extends from jejunum to large intestine
ileum
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circular folds
villi
microvilli
structural modifications to small intestine
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deep folds of mucosa and submucosa
circular folds
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fingerlike structures formed by the mucosa
simple columnar epithelium with microvilli
capillary bed and lacteal: carry away absorbed nutrients
villi