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66 terms

lab ch 18: resp/digestive functions

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air passageways
nares function
nasal cavity
filters, warms, and moistens air as it passes through cavity
hard palate
prevents movement of food and fluid from oral cavity into nasal cavity
soft palate
moves during swallowing preventing food and fluids from entering nasopharynx
air passageway
posterior nasal apertures function
pharynx
passageway for air, food, fluids
larynx
air passageway and phonation
epiglottis
its movement prevents food and fluids entering larynx during swallowing
vocal folds
phonation and their closure prevents food and fluids from entering larynx
air passageway
glottis function
air passageway
trachea function
air passageway
primary bronchii function
air passageway
secondary bronchii function
pleurae
secrete pleural fluid
inspiratory muscles
diaphragm, external intercostals
expiratory muscles
internal intercostals, rectus abdominis, external/internal obliques, transversus abdominis
oral cavity
passageway for food and fluids, alternate passageway for air
lips
obtain food and retain it in oral cavity
cheeks
retain food in oral cavity
tongue
moves food during chewing and swallowing; changes shape and position for speech
mechanical digestion
teeth function
esophagus
passageway for food and fluids
esophageal hiatus
passageway for esophagus
peritoneum
secretes peritoneal fluid
stomach
passageway for food and fluids; does some digestion, site of temporary food storage
pyloric sphincter
regulates rate at which chyme leaves stomach
rugae
prevent tearing of mucosa when stomach expands
greater omentum
fat storage
small intestine
passageway for food and fluids; site of most digestion and absorption
plicae circulares
increase surface area on small intestine
mesentery
suspends intestines and prevents tangling
large intestine
passageway for food and fluids; reabsorbs water and stores feces
passageway for food and fluids
cecum function
ileocecal valve
prevents movement of cecal contents back into small intestine
anal canal
regulates defecation
parotid glands
secrete saliva
parotid ducts
passageways for saliva from parotid glands to oral cavity
parotid glands, submandibular glands
secrete saliva (2)
liver
produces bile and performs many nondigestive functions
falciform ligament
attaches liver to diaphragm and anterior body wall
gallbladder
stores bile
bile passageway
common hepatic duct, cystic duct, bile duct are all ____
pancreas
secretes digestive enzymes and bicarbonate solution
maxillae, mandible
teeth are found in what bone(s)
stomach
rugae are found in the _____
small intestine
most absorption of nutrients occurs in the
buccinator
what muscle does a parotid duct pierce
greater omentum, mesentery, falciform ligament
3 specific portions of the peritoneum
stomach
has gastric pits
colon
has pink stained goblet cells
stomach, small intestine, colon
has a serosa
esophagus, stomach, small intestine, colon
has a lamina propria
esophagus
has stratified squamous epithelium
hyaline
what specific type of cartilage tissue composes the C-shaped cartilages of the trachea
pseudostratified ciliated columnar epithelium, yes
what specific type of epithelium lines the trachea and does this epithelium have goblet cells
simple squamous epithelium
what specific type of epithelium composes alveolar walls
nares, larynx, trachea, primary bronchi, secondary bronchi
beginning w/ external nares and ending w/ alveoli, give all airways that have hyaline cartilage in their walls
prevent walls from collapsing
function of hyaline cartilage in structures
pseudostratified ciliated columnar epithelium lining airways
small particles stick to mucus secreted by this epithelium and ciliary action moves mucus/particles out of airway
divide nasal cavity
function of bone in nasal cavity
simple squamous epithelium of alveoli
making thin membrane across which gas can easily diffuse
to keep trachea from collapsing. stabilize anterior portion, flexible posterior b/c of food passing behind
what is the functional significance of C-shaped tracheal cartilages
having many small ones is more efficient and allows for more gas exchange
why is it advantageous for respiratory tract to end in many small alveoli instead of one large one
submucosa
provides local control over activities of tract
muscularis externa
coordinates peristalsis. wavelike contractions that move foodstuffs through digestive tract
serosa
visceral peritoneum --> reduce friction during tract movements