fundamentals- chapter 26 Flashcards
structures in the digestive system
- mouth
- teeth
- tongue
- pharynx
- esophagus
- stomach
- small intestine
- large intestine
- anus
accessory organs
- salivary gland
- liver
- gallbladder
- pancreas
mouth
- the first part of the digestive tract
- contains tongue and teeth
- receives food and breaks it down
- receives secretions from the salivary glands
- tongue is mostly skeletal muscle; most movable organ of the
mouth - adults have 32 permanent teeth
- cuspids, incisors, bicuspids, and molars
parotid glands
- largest salivary glands
- one on each side
- located anterior and inferior to the ear
- secrete saliva into the mouth
- begins digestion of starches
pharynx
- connects the nasal and oral cavities to the esophagus
- food is forced into the pharynx by the tongue
esophagus
- muscular tube approx. 20cm long
- propels food into the stomach from the pharynx using muscular
contraction - lining secretes mucus
stomach
- located in the ULQ of the abdomen
- capacity of approx. 1.5L
- has 2 sphincters
- temporary storage place for food
- mixes food with digestive juices
- changes food into a semiliquid state
- begins digestion of proteins
- absorbs vitamin B12
small intestine
- duodenum, jejunum, ileum
- mixes food with secretions from liver and pancreas
- finishes digestion
- absorbs nutrients
large intestine
- ascending, transverse, descending, sigmoid colon, rectum, anus, cecum
- absorbs fluid and electrolytes
- eliminates waste products
liver and gallbladder
- concentrate, store, and secrete bile into the duodenum
pancreas
- secretes digestive juices
- produces insulin
changes that occur with aging
dental care and tooth loss
- decreases ability to chew food
decreased gag reflex
- increases risk of aspiration
decreased sense of taste
- may lead to a loss of appetite
decreased muscle tone at sphincters
- increases risk of esophageal reflux
decreased gastric secretions
- may interfere with digestion of food
decreased peristalsis
- increased risk of constipation
metabolism
- large molecules are broken down into smaller molecules
- makes energy available to the organism
- enables absorbed nutrients to enter bloodstream following digestion
digestion
converts food into chemical substances such as proteins and simple sugars to be used by the body for energy production and cellular metabolism
USDA MyPlate
- emphasizes fruits, vegetables, whole grains, and fat-free or low-fat milk and milk products
- includes lean meats, poultry, fish, beans, eggs, and nuts
- low in saturated fats, trans fats, cholesterol, sodium, and added sugars
anasarca
generalized swelling
protein
- essential for replacing and rebuilding body tissues
- hormone production, fluid balance, antibody production, and transportation of nutrients
- approx. 4 kcal/g
- 9 essential amino acids
- 11 nonessential
essential amino acids
- cannot be synthesized by the body
- must be obtained via diet
- “indispensable” amino acids
- all found in soybeans