Chapter 12 Spelling words Flashcards
gastrointestinal tract
another name for the digestive system or alimentary canal
digestive tract
another name for the digestive system or alimentary canal
alimentary canal
- another name for the digestive tract, digestive track , and gastrointestinal tract
- musculomembranous tube, about 30 feet, extending from the mouth to the anus and lined with mucous membrane
gastroenterologist
-a physician who specializes in the study of diseases affecting the gastrointestinal tract (including stomach, intestines, gallbladder, and bile duct)
gastr/o=stomach enter/o=small intestine -logist=one whoe specializes in the study of
nutritionist
-an allied professional who studies and applies the principles and science of nutrition
rugae
- irregular ridges or folds in mucous membrane lining of the hard palate
- they are also found in the stomach which allows the stomach to expand
uvula
- a small, cone-shaped projection where the soft palate ends
- aids in the digestive track
- helps in producing sounds and speech
mastication
-chewing, tearing or grinding food with the teeth while it becomes mixed with saliva
deglutition
swallowing
papillae
- small, rough elevations on the tongue
- contain the taste buds that detect sweet, sour, salty, and bitter tastes of food or beverages
amylase
-an enzyme that aids in the digestion of carbohydrates by breaking them down into smaller carb molecules
amyl/o=starch -ase=enzyme
lipase
-an enzyme that aids in the digestion of fats
salivary glands
- part of the accessory structures of the digestive tract
- 3 pairs=the parotids, the submandibulars, and the sublinguals
- secretes most of the saliva produced each day through ducts
saliva
- water and mucous and digestive enzymes
- softens food and begins the digestion of food
gingiva
- a gum
- gum tissue
- plural=gingivae
pharynx
- the throat
- passageway for both the respiratory and digestive systems
- 3 parts= the nasopharynx, the oropharynx, and the laryngopharynx
oropharynx
-the portion of the pharynx leading away from the oral cavity
esophagus
- receives food from the pharynx and propels it on to the stomach
- muscular tube, 10” long, passes through an opening in the diaphragm and connects to the stomach
cardiac sphincter
-the muscular ring that controls the passage of food from the esophagus into the stomach
-also known as the lower esophageal sphincter (LES)
-when it relaxes—it opens to allow food
-when it contracts—it closes and prevents stomach content from going back into the esophagus
cardi/o=heart -ac=pertaining to
stomach
- in ULQ and have 3 major divisions=the fundus, the body, and the pylorus
- gastric juices found in the folds chemically break down foods
- muscular action causes churning which mixes the food with the secretions to create chyme
duodenum
-the first part of the small intestines
-also referred to as the gastric antrum
-apppr. 12” long
-receives chyme from the pylorus, secretions from the liver and pancreas
-the shortest, widest and most fixed portion of the small intestine
duoden/o=duodenum -um=noun ending
pyloric sphincter
- regulates the passage of the food from the stomach into the duodenum
- releases chyme in small amounts into the small intestine
chyme
-a liquid-like mixture of partially digested food and digestive secretions in the stomach just before it is released into the duodenum
jejunum
- connects the duodenum to the illeum
- appr. 8ft long
ileum
- continuous with the jejunum
- connects it to the large intestine at the ileocecal sphincter
- distal portion of the small intestine extending from the jejunum to the cecum
villi
- tiny, fingerlike projections in the mucous membrane of the small intestine
- surrounded by capillaries and functions to absorb nutrients
cecum
- a blind pouch on right side 2-3 inches beyond the ileocecal junction to the beginning of the colon
- the vermiform appendix hangs from the lower portion
- contains the first part of the colon
- joins the last part of the small intestine, the illeum
colon
- the longest portion of the large intestine
- 4 sections=ascending, transverse, descending, and sigmoid colon
- ascends from the cecum to the rectum
sigmoid colon
- the curved portion of the colon
- connects the descending colon to the rectum
rectum
- last 7-8 inches of the large intestine
- connects the sigmoid colon to the anus
anus
-the opening through which feces are eliminated from the body
an/o=anus -us=noun ending
feces
- the solid waste products of digestion
- formed in the intestines and expelled through the rectum
defecation
-the act of expelling feces from the rectum through the anus
bile
- a yellowish-greenish emulsifier of fats
- comes from the liver
- components are bile salts, bile pigments, and cholesterol
gallbladder
- pear-shaped sac on the undersurface of the right lobe of the liver and connected via the cystic duct
- stores and concentrates the bile produced by the liver
- bile is released when chyme enters the duodenum and the presence of fatty content is detected
bilirubin
- primary bile pigment
- orange-yellow pigment of bile
- formed by the breakdown of hemoglobin in RBCs at the end of their life span
glucose
- simple sugar
- major source of energy occurring in human and animal body fluids
glycogenesis
-when the liver converts excess amounts of blood glucose into a complex form of sugar (starch) for storage in the liver cells
glyc/o=sugar; sweet -genesis=the production of; formation of
glycogen
- complex sugar (starch)
- the major carbohydrate stored in animal cells
- -preserved in the liver for use when the blood sugar is extremely low
- formed from glucose
glycogenolysis
-when blood sugars are dangerously low, the liver breaks down the stored glycogen into glucose and releases it into the blood
glyc/o=sugar; sweet gen/o=to produce -lysis=destruction or detachment
pancreas
- elongated organ of appr. 6-9 inches in ULQ of abdomen, behind the stomach
- functions both as a exocrine and endocrine gland
- exocrine=manufactures digestive juices containing trypsin, pancreatic lipase, pancreatic amylase, and sodium bicarbonate, which neutralizes acidic stomach content
- endocrine=manufactures insulin, which go right into the blood capillaries
- Cells=beta cells (insulin); alpha cells (glucagon)
glucagon
- a hormone that stimulates the liver to convert glycogen into glucose
- produced by the alpha cells of the pancreas
- stimulates the liver to convert glycogen into glucose when the blood sugar is dangerously low
deciduous teeth
- the first set of teeth
- the “baby teeth”
- set of 20, beginning at 6 months and gone by 17 yrs old
enamel
- the hardest substance in the body
- covers the dentin of the crown of a tooth
dentin
- surrounds the pulp cavity
- forms the bulk of the tooth shell
- situated inside of the enamel and cementum
absorption
the passage of substances across and into tissues, such as the passage of digested food molecules into intestinal cells or liquids into kidney tubules
amino acids
an organic chemical compound of one or more basic amino groups and one or more acidic carboxyl groups
ascitic fluid
- a watery fluid that accumulates in the peritoneal cavity in assoc. w/ certain diseases (such as liver disease)
- consists of albumin, glucose, and electrolytes
bicuspid tooth
- one of two teeth between the molars and canines
- have flat surface for crushing and grinding food
- also known as premolar tooth
bolus
-ball-like mass of chewed food that is ready to be swallowed
bowel
-the portion of the alimentary canal extending from the pyloric opening of the stomach to the anus
canine tooth
- any one of the four teeth immediately lateral to the incisor teeth in the human dental arches
- also called cuspid tooth
cholelithiasis
-abnormal presence of gallstones in the gallbladder
chol/o=bile lith/o=stone; calculus -iasis=presence of an abnormal condition
cuspid tooth
-canine tooth
emulsify
to disperse a liquids into another liquid, making a colloidal suspension
endocrine gland
-a gland that secretes its enzymes directly into the blood capillaries instead of being transported by way of ducts
endo=within -crine=secrete
enzyme
- a protein produced by living cells that catalyzes chemical reactions in organic matter
exocrine gland
-a gland that secretes its enzymes into a network of tiny ducts that transport it to the surface of an organ or tissue or into a vessel
gavage
-a procedure in which liquid or semiliquid food is introduced into the stomach through a tube
gingivitis
-inflammation of the gums
gingiv/o=gums -itis=inflammation
hematemesis
-vomiting of blood
hemat/o=blood -emesis=to vomit
hepatocyte
-liver cell
hepat/o=liver cyte=cell
hydrochloric acid
-a compound consisting of hydrogen and chlorine
incisor
one of eight teeth the first appear as primary teeth during infancy are replaced by permanent incisors during childhood and last until old age
insulin
a naturally occurring hormone secreted by the beta cells of the islets of Langerhans in the pancreas in response to increased levels of glucose in the blood
molar tooth
- any of the 12 teeth posterior to the premolar teeth
- flat surface with multiple projections (cusps) for crushing and grinding food
parotid gland
-one of the largest pairs of salivary glands that lie at the side of the face just below and in front of the external ear
paristalsis
-the coordinated, rhythmic, serial contraction of smooth muscle that forces food through the digestive tract, bile through the bile duct, and urine through the ureters
peritoneum
-the serous membrane that covers the entire abdominal wall of the body and is reflected over the contained viscera
sphincter
-a circular band of muscle fibers that constricts a passage or closes a natural opening in the body, such as the hepatic sphincter in the muscular coat of the hepatic veins near the union with the superior vena cava (or anal sphincter)
triglycerides
-a compound consisting of fatty acid (oleic, palmitic, or stearic) and glycerol
uvula
-the small- coned-shaped process suspended in the mouth from the middle of the posterior border of the soft palate
achlorhydria
-an abnormal condition characterized by the absence of hydrochloric acid in the gastric juice
a=without, not chlor/o=green hydr/o=water -ia=condition
anorexia
-lack of or loss of appetite, resulting in the inability to eat
an=without -orexia=to eat
aphagia
-a condition characterized by the loss of the ability to swallow as a result of organic or psychologic causes
borborygmus
- an audible abdominal sound produced by hyperactive intestinal peristalsis
- rumbling, gurgling, and tinkling noises heard when listening with a stethosope
constipation
-difficulty in passing stools or an incomplete or infrequent passage of hard stools
diarrhea
-a frequent passage of loose, watery stools