Lecture 7 (Digestive System) Flashcards
Alimentary Canal
Digestive or gastrointestinal tract
1. Can break down both chemically and mechanically
2. Deals with excretion of waste
3. Deal with water balance
Composed of: mouth, teeth, tongue, phranyx, skeletal muscle, stomach, small intestine, large intestine, colon, rectum, pancreas, gall bladder
Tongue
Skeletal muscle
Frenulum holds the tongue down, too short can make sounds correctly, “tongue-tied”
Papillae
Found the tongue
Filiform: cones, fine projections that give appearance of the tongue
Fungiform: mushroom
Circumvalate: V shapened, include the test buds at the back of the tongue
Tonsil
huge collection of white blood cells
Lingual: base of the tongue
Pharyngeal = adenoids: throat
Palatine: tongue/ palate
Teeth Lose
Bone/ socket, will be reabosrobed make the jaw lighter
Cancers of the tongue
Chewing tobacco primary cause
GERD
Gastroesophegal reflux disease "heart burn" acid will enter by passing the sphincter can cause cancer and ulcers Blood from ulcers can increase risk of cancer
Stomach
Acts like a blender, doesnt absorb nutrients
Duodenum Dumping
Too much food too fast
Ulcers in the stomach
Not eating enough, digest stomach, can cause bacterial infection
Diet and Cancer
USA = colon high fat diets deficient in fiber Asian = stomach Spices and ingredients and msg FIX Low fat high fiber
Greater Omentum
Lots of blood vessel and white blood cells
Covers all intestines
Shock absorber
Lymph node site
Duodenum
Mucus and alkaline fluid, correct the ph from the stomach acid
Protect against ulcers
Ulcers here will show up as dark stool
Jejunum
Permanent folds, 8 to 10 feet long
Ileum
Smoother 10 to 12 feet long
Colon
has droplet of fat on the outside, fold, 3 feet long
Vermiform appendix
Tiny hole, near the beginning of the colon, if blocked, burst creates infection to the intestines
Appendicitis of the vermiform
Lymph nodeals
Appendix of the ileum
Meckle's diverticulum 2 x 2 x 2 rule two proximal of illeceual valve two inches long Two percent of pop Its a genetic condiction If born with it can burst
Diarrhea
Food goes to rapidly through the colon
liquid stool cause of secretion through out the way
the colon major role is water absorption
Caused: infection, viral or stress
Tremendous water loss
Children with cholera quickly die because of water loss
Hemerroids
Veins at the end of the rectium
can devo varicose veins
occurs when not enough water and stiff stool
tear the veins
Polyps
devo abnormal growth of the lining
can devo into cancer
parasites
can go into the blood stream
