Chapter 5 Flashcards
ingest
to take in for or as if for digestion
aid
to provide with what is useful or necessary in achieving an end.
peristalsis
the involuntary progressive, rhythmic contraction of muscles in the wall of the esophagus (and other gastrointestinal organs)
nhu động ruột
bolus
mass of food
1st part of the stomach
fundus (upper portion)
đáy vị
2nd part of the stomach
body (middle section)
thân vị
3rd part of the stomach
antrum (lower section)
hang vị
regurgitate
flowing backward from the normal direction
trào ngược
lower esophageal sphincter
relaxes and contracts to move
cơ thắt tâm vị
pyloric sphincter
allows food to leave the stomach when it is ready
cơ thắt môn vị
rugae
folds in the mucous membrane (mucosa)
1st part of the large intestine
doudenum
tá tràng
2nd part of the large intestine
jejunum
hổng tràng
bile
digestive juice made in the liver and stored in the gallbladder. It breaks up (emulsifies) large fat globules. Bile originally was called gall, probably bc it has a bitter taste. It is composed of bile pigments, cholesterol, and bile salts
mật
ileum
hồi tràng
amylase
enzyme secreted by the pancreas to digest starch
anus
terminal end or opening of the digestive tract to the outside of the body.
appendix
blind pouch hanging from the cecum (in the right lower quadrant (RLQ). It literally means hanging (pend/o) on to (ap-, which is a form of ad-).
bilirubin
pigment released by the liver in bile
bowel
intestine
canine teeth
pointed, dog-like teeth (canine means pertaining to dog) next to the incisors. Also called cupids or eyeteeth.
răng nanh
cecum
first part of the large intestine
manh tràng
colon
large intestine, consisting of the cecum; the ascending, transverse, and descending segments of the colon; and the rectum
common bile duct
carries bile from the liver and galbladder to the duodenum.
also called the choledochus
cystic
pt galbladder
defecation
elimination of feces from the digestive tract through the anus.
deglutition
swallowing
dentin
the primary material found in teeth. It is covered by the enamel in the crown and a protective layer of cementum in the root.
ngà răng
digestion
breakdown of complex foods to simpler forms.
duodenum
first part of the small intestine. Duo = 2, den = 10; the duodenum measures 12 inches long
elimination
act of removal of materials from the body; in the digestive system, the removal of indigestible materials as feces
emulsification
physical process of breaking up large fat globules into smaller globules thereby increasing the surface area that enzymes can use to digest the fat
enamel
hard, outermost layer of a tooth.
enzyme
a chemical that speeds up a reaction between substances. Digestive enzymes break down complex foods to simpler substances. Enzymes are given names that end in -ase
esophagus
tube connecting the throat to the stomach. Eso- means inward; phago- means swallowing.
fatty acids
substances produced when fats are digested.
feces
solid wastes; stool
gallbladder
small sac under the liver; stores bile.
Remember: gallbaldder is one word!
glucose
simple sugar
glycogen
starch; glucose is stored in the form of glycogen in liver cells.
hydrochloric acid
substance produced by the stomach; necessary for digestion of food.
ileum
third part of the small intestine; meaning twisted. When the abdomen was viewed at autopsy, the intestine appeared twisted, and the ileum often was an area of obstruction.
incisor
one of four front teeth in the dental arch.
insulin
hormone produced by the endocrine cells of the pancreas. It transports sugar from the blood into cells and stimulates glycogen formation by the liver.
jejunum
second part of the small intestine. This part of the intestine was always empty when a body was examined postmortum
lipase
pancreatic enzyme necessary to digest fats.
liver
a large organ located in the RUQ of the abdomen. The liver secretes bile; stores sugar, iron, and vitamins; produces blood proteins; and destroys worn-out red blood cells. The normal adult liver weighs about 2,5 to 3 pounds
lower esophageal sphincter (LES)
Rings of muscles between the esophgus and the stomach.
Also called cardiac sphincter.
mastication
chewing.
molar teeth
the sixth, seventh, and eighth teeth from the middle on either side of the dental arch.
răng cối
premolar teeth
the fourth and fifth teeth, before the molars
palate
roof of the mouth, The hard palate lies anterior to the soft palate and is supported by the upper jawbone (maxilla). The soft palate is the posterior fleshy part between the mouth and the throat.
pancreas
organ under the stomach; produces insulin (for transport of sugar into cells) and enzymes (for digestion of foods).
papillae (singular: papilla)
pờ pi lì
small elecations on the tongue. A papilla is a nipple-like elevation.
gai vị giác
parotid gland
salivary gland within the cheek, just anterior to the ear
TNB mang tai
portal vein
large vein bringing blood to the liver from the intestines.
protease
enzyme that digests protein.
pulp
soft tissue within a tooth, containing nerves and blood vessels.
pyloric sphincter
Ring of muscle ar the end of the stomach, near the duodenum. From the Greek pyloros, meaning gatekeeper. It is normally closed, but opens when a wave of peristalsis passes over it.
cơ vòng môn vòng.
pylorus
môn vị
rectum
Last section of the large intestine, connecting the end of the colon and the anus.
rugae
rugae on the hard palate and the wall of the stomach
saliva
digestive juice produced by salivary glands.
sigmoid colon
fourth and last, S-shaped segment of the colon, just before the rectum; empties into the rectum
sphincter
circular ring of muscle that constricts a passage
stomach
muscular organ that receives food from the esophagus
triglycerides
fat molecules composed of three parts fatty acids and one part glycerol
uvula
soft tissue haging from the middle of the soft palate. The Latin uva means bunch of grapes.
villi (singular: villus)
microscopic projections in the wall of the small intestine that absorb nutrients into the bloodstream.
gastrointestinal tract
begins with the mouth, where food enters, and ends with the anus.
four functions of the digestive system
ingestion, digestion, absorption, and elimination.
Ingestion
complex food material taken into the mouth is ingested.
digestion
food is digested, or broken down, mechanically and chemically,, as it travels through the gastrointestinal tract. Digestive enzymes speed up chemical reactions and aid the breakdown (digestion) of complex nutrients. Complex proteins are digested to simpler amino acids; complicated sugars are reduced to simple sugars, such as glucose ; and large fat or lipid molecules are broken down to simpler substances such as fatty acids and triglycerides
absorption
digested food passes through the lining cells or epithelium of the small intestine and into the bloodstream. Nutrients thus travel to all cells of the body. Cells then break down nutrients in the presence of oxygen to release energy. Cells also use amino acid nutrients to build up large protein molecules needed for growth and development.. In addition, fat molecules are absorbed into lymphatic vessels from the intestine.
elimination
the large intestine concentrates these solid wastes, called feces, and the wastes finally pass out of the body through the anus.
cheeks
the walls of the oval-shaped oral cavity.
hard palate
the anterior portion of the roof of the mouth
rugae
irregular ridges in the mucous membrane covering the anterior portion of the soft membrane.
uvula
a small soft tissue projecction hangs from the soft palate. It aids production of sounds and speech.
tongue
extends across the floor around during mastication (chewing) and deglutition (swallowing)
mastication
chewing