Chapter 14: Structure and Function of the Digestive System Flashcards
the study of the digestive system is calle _____.
gastroenterology
the digestive system is also known as the _____ system
alimentary
some functions of the digestive system is processing the break down, metabolization, and supply, of_____ to the body.
nutrients
_____ consists of the nature in which food proceeds through the body via peristalsis, or the wavelike muscle contraction that move food to different processing stations of the digestive tract.
gastroenterology
stomat/o
mouth
dent/o, odont/o
teeth
gloss/o, lingu/o
tongue
cheil/o
lips
gingiv/o
gums
esophag/o
esophagus
pharyng/o
pharynx
enter/o
intestine
duoden/o
duodenum
jejun/o
jejunum
ile/o
ileum
colon/o
colon
sigmoid/o
sigmoid colon
rect/o
rectum
proct/o
anus and rectum
hepat/o
liver
cholecyst/o
gallbladder
chole
gall
cyst/o
bladder
pancreat/o
pancreas
saliv/o
salivary glands
what are the three basic functions of the digestive system?
digestion, absorption, and elimination
_____ is the process of breaking down foods into nutrients that can be absorbed by cells.
digestion
_____ is the passing of digested nutrients into the bloodstream. This primarily occurs in the small intestines.
absorption
_____ is the conversion of any residual material from a liquid to a solid and removal. of that material from the alimentary canal via defecation.
elimination
the digestive system consists of the ____ ____ (digestive tract or gastrointestinal tract) and several accessory organs.
alimentary canal
food enters the alimentary canal through the _____, passes through the _____ and into the _____, then into the _____ and or _____, and then into the ______.
mouth; pharynx; esophagus; stomach; small intestines; large intestines; bowels; anal canal
the alimentary canal is a tube that extends from the mouth to the ____.
anus
the wall of the alimentary canal has four layers that aid in ____, the movement of chyme.
peristalsis
digestive _____ convert complex proteins into ____ ____, compounds that can be absorbed by the body.
enzymes; amino acids
complex sugars are reduced to _____ and other simpler sugars, and fat molecules are reduced to ____ ____ and other substances through the action of the digestive enzymes.
glucose; fatty acids
the _____ sense the food that is about to enter the mouth.
lips
once food is taken into the oral cavity (mouth), it is chewed with the help of the muscles of the _____ (walls of the oral cavity) and the _____ (which moves food during _____(chewing)).
checks; tongue; mastication
The last mechanical process that takes place in the mouth is _____ (swallowing).
deglutition
The tongue has ____ (pl. _____), small raised areas that contain the taste buds (cells that provide the sensation of taste).
papilla; papillae
the tongue is connected to the floor of the mouth by a mucous membrane call a _____.
frenulum
at the back of the tongue, _____ _____form two round mounds of lymphatic tissue that play an important role in the immune system.
lingual tonsils
the roof of the mouth is formed by the ____ ____, the hard anterior part of the palate with irregular ridges of mucous membranes called _____, and the ____ ____ the soft posterior part of the palate.
hard palate; rugae; soft palate
A the back of the soft palate is a downward cone-shaped projection called the _____.
uvula
on either side of the back of the mouth are rounded masses of lymphatic tissue called the _____ _____.
palatine tonsils
the mouth contains the _____, the fleshy sockets that hold the teeth.
gums
the three sets of ____ ____ surrounding the oral cavity secrete _____, a fluid containing enzymes (such as _____, an enzyme that begins the digestion of carbohydrates) that aid in breaking down food.
salivary glands; saliva; amylase
from the mouth, food travels through the throat (pharynx). Both food and air share this passage way.
pharynx
when we eat and swallow food, a flap of tissue (the _____) covers the trachea until the food is moved into the esophagus.
epiglottis
once the food is in the stomach, it will close this prevents _____ (backflow) and _____ or _____ (vomiting). Everytime more food comes through the esophagus to the stomach, the muscles relax and allow the food to pass.
reflux; regurgitation; emesis
gastr/o
stomach
what are the three main functions of the stomach?
further break down food particles, initiate protein digestion, and mix it.
any disease of the stomach
gastropathy
the enzyme _____ in the gastric juice begins protein digestion.
pepsin
what are the four regions of the stomach?
cardiac region, fundus, body, and pylorus
the _____ _____, the region closest to the heart is where the cardiac sphincter allows food to enter the stomach and prevents regurgitation.
cardiac region
if the cardiac sphincter does not close, stomach juices can splash into the esophagus causing _____.
heartburn
the _____ is the middle portion of the stomach.
body
the _____, the narrowed bottom part of the stomach, has a powerful, circular muscle at its base, the pyloric sphincter. this sphincter controls the emptying of the stomach’s contents into the small intestine.
pylorus
after eating, the muscular movements of the stomach and the mixing of food with gastric juice form a semifluid mass called.
chyme
what are the three parts of the small intestine?
duodenum, jejunum, and ileum
the ______ is only about 10 inches long. In it, chyme mixes with bile to aid in fat digestion; with pancreatic juice to aid in digestion of starch, proteins, and fat; and with intestinal juice to aid in digesting sugars (glucose). Glands in the walls of the intestine secrete intestinal juice. the juices also help change starch (_____) into glucose.
duodenum; glycogen
the small intestine is lined with _____ (sigular, _____), tiny, one-cell-thick fingerlike projections with capillaries through which digested nutrients are absorbed into the bloodstream and lymphatic system.
villi; villus
the ______ is an 8-foot-long section of the small intestine in which the digestive process continues.
jejunum
the _____ connects the small intestine to the large intestine.
ileum
the small intestine lies within the abdominopelvic cavity, where it is help in place by the _____, a membranous tissue that attaches both the small and large intestines to the muscle wall at the dorsal part of the abdomen.
mesentery
what are the four parts of the large intestine?
cecum, colon, sigmoid colon, and rectum
the _____ is a puch attached to the bottom of the ileum of the small intestine.
cecum
a wormlike puch connected to the cecum.
appendix
the appendix is filled with lymphatic tissue but is considered an _____, an accessory part of the body that has no central function.
appendage
the middle section of the large intestines is the _____.
colon
what are the three parts of the colon?
ascending colon, the transverse colon, and the descending colon
the angle between the ascending colon and transverse colon?
hepatic flexure
what is the right-angle bend between the transverse colon and the descending colon?
splenic flexure
the _____ _____ is an s-shaped body that goes across the pelvis to the middle of the sacrum, where it connects to the rectum.
sigmoid colon
the _____ attaches to the anal canal
rectum
_____ (_____) then pass from the anal canal into the anus.
feces; stool
the anus and anal canal open during the release of feces from the body (_____).
defecation
what is the most important function of the liver?
bile secretion
what acts as a storage area for bile until it is needed for digestion?
gallbladder
the _____ is an important digestive organ located in the upper quadrant of the abdominal cavity
liver
aside from changing food nutrients into usable substances, the liver also secretes _____ (a yellowish-brown to greenish fluid), which is stored in the gallbladder for uses in breaking down fats and other digestive functions.
bile
the liver also secretes _____, a bile pigment that is combined with bile and excreted into the duodenum.
bilirubin
the bile released from the liver to the hepatic duct is then released into the cystic duct, which brings the substance into the _____. This organ is involved in the production, storage and transportation of bile.
gallbladder
at the entrance to the duodenum, bile mixes with pancreatic juices and enters the duodenum from the collon bile duct. There the bild aids in _____, the breaking down of fats.
emulsification
the _____ digiestive organ in that it secretes fluids into the small intestine through its system of ducts.
pancreas
the digestive fluid is called pacreatic juice, which includes various enzymes such as amylase and _____.
lipase
surgical repair of the anus is _____plasty.
ano-
_____itis is inflammation of the appendix.
appendic-
green bile pigment is _____verdin.
bili-
_____gingival pertains to the cheeks and gums.
bucco-
_____pexy is surgical repair of fixing of the cecum to correct excessive mobility.
ceco-
a tumor in the abdomen is a(n) _____oma.
celi-
pertaining to bile is _____ic.
chole-