Digestive/excritory System Flashcards
functions of digestive system
▫mechanical and chemical break down of food
▫absorption of nutrients
other names for digestive system
▫alimentary canal
▫gastrointestinal tract
layers of alimentary canal outside to inside
▫serosa
▫muscular
▫submucosa
▫mucosa
function of serosa layer
lubricates peritoneum
function of muscular layer
movement of materials
submucosa layer function
contains glands, blood vessels, and nerves
mucosa later function
absorbs nutrients
teeth function
grind food
eliglottis
covers trachea
uvula function
covers nasal passage
3 areas of salivary glands
▫parotid
▫submandibular
▫sublingual
parotid is located
by ear/cheeck
submandibular located
below jaw
sublingual is located
under tongue
amylase converts _____ into_____
starch into sugars
esophageal hiatus
when esophagus passes through diaphragm
cardiac sphincter
opens and closes entrance to stomach from esophagus
function of esophagus
tube that carries/pushes food from mouth to stomach
stomach
mixes food with digestive juices
pepsin breaks down
proteins
chyme
lumpy paste made my stomach
rugae
folds of stomach to increase surface area
regions of the stomach
▫cardiac
▫fundus
▫body
▫pyloric
cardiac region of the stomach
where esophagus meets stomach
fundus region of stomach
region next to cardiac higher than esophageal entrance
body of stomach
main part of stomach
pyloric part of stomach
region where stomach attaches to duodenum
HCL in stomach is used to
kill bacteria
how long is the small intestine
18ft
3 regions of small intestine
▫duodenum
▫jejunum
▫ileum
region where the small and large intestines meet
cecum
function of the small intenstine
absorb nutrients
function of the large intestine
absorbs water and concentrates waste
length of large intestine
4.5 ft
regions if the large intestine
▫ascending
▫transverse
▫descending
▫sigmoidal
rectum
short term storage of solid waste
anus
muscular sphincter which controls the excretion of solid waste
accessory structures
▫liver
▫gallbladder
▫pancreas
liver function
▫produces bile
▫filters toxins
how many lobes of the liver are there
4
gallbladder
stores bile from the bile and releases it into the small intestine
four phases of digestion
▫ingestion
▫digestion
▫movement
▫absorption
ingestion
consumption or taking in of nutrients
mechanical digestion
physically tearing and grinding food
mechanical digestion is done mostly by
teeth and tongue
chemical digestion
different enzymes break down carbohydrates, proteins, and lipids
pH of saliva
7
bolus
food after it mixes with saliva
peristalsis
the involuntary constriction and relaxation of smooth muscle to push food
function if good gut bacteria
help to breakdown compounds into absorbable nutrienrs, produce certain vitamins, and neutralize harmful compounds
gleeking
accumulation of saliva in the submandibular gland that is propelled out
stomach growls
when muscles contract and mood air in your stomach and intestine
acid reflux
▫small amount of stomach acid going into the esophagus
▫s- burning sensation of the “heart”
ulcers
▫sores on the inner walls of the stomach or small intenstines
causes of ulcers
▫bacteria (h. pylori)
▫smoking, alcohol, stress
ulcer symptoms
▫burning pain in abdomen
ulcer treatments
antacids
drugs to block histamine release
indigestion
▫stomach acid becomes too acidic (lower pH)
▫caused by eating too fast, too much, or foods that are spicy/acidic
appendicitis
▫when appendix becomes inflamed
▫s- pain in lower right quadrant, tenderness, fever, nausea, vomiting
indigestion treated
antiacids
diarrhea
watery feces caused by the large intestine not absorbing enough water
diarrhea causes
▫bacteria
▫viruses
▫food poisoning
▫nutritional deficiencies
cirrhosis
▫chronic degradation of the liver mostly caused by alcohol consumption
▫normal tissue replaced with fibrous tissue
gastroenteritis
▫inflammation of the mucous membrane lining of the stomach and intestines
▫causes by viruses
gastroenteritis symptoms
diarrhea and vomiting for 24-36 hours
gallstones
▫when bile solidifies into tiny rocks
▫can be genetic or caused by weight
▫treated by surgery
kidney stones (nephrolithiasis)
▫occur due to decrease in urine volume or excess stone forming substances in urine
▫s-pain and blood in urine
▫treated by surgery or passing
lap band surgery
▫device is placed around the upper portion of the stomach to slow the consumption of food
▫used for weight loss in extreme cases
celiac disease
▫autoimmune disorder affecting villi/microvilli of small intestine
▫s- diarrhea, abdominal distension, loss of appetite
crohn’s disease
▫inflammatory bowel disease that can affect any part of the alimentary canal
▫s- abdominal pain, diarrhea, fever, and weight loss
crohn’s treatment
antibiotics, strict diets, and surgery
colon cancer
▫uncontrolled cell growth on intestinal cells caused by genetics, age, or diet
▫s- diarrhea, constipation, rectal bleeding, pain, ibs, unexplained weight loss
colon cancer treatment
chemotherapy, radiation, or surgery
functions of excretory system
collects and removes waste
cellular waste examples
heat, water, salts, CO2, urea
solid waste is made of
excess food and compounds that can’t be broken down
urinary system consists of
▫kidneys
▫ureters
▫urinary bladder
▫urethra
kidney function
filter blood to remove cellular waste products
functional unit of the kidney
nephron
blood is supplied to the kidney by ____ and returned via _____
supplied b renal artery
returned by renal vein
nephron function
clean and rebalance the blood to produce urine
renal capsule
outermost membrane of the kidney that protects kidney and helps is maintain shape
renal cortex
reddish part of the kidney that contains the bowman’s capsules and tubules
renal medulla
red-brown part if kidney that contains the loops of henle
renal pyramids
segments of the medulla that contain nephrons
renal columns
regions between pyramids
3 stages of filtration
▫filtration
▫reabsorption
▫excretion
filtration occurs in
bowman’s capsule
what cannot be removes during filtration
red blood cells, platelets, and hormones
reabsorption occurs in
tubules
ureters
tubes that carry urine from kidneys to bladder
urinary bladder
temporarily stores urine
urethra
carries urine from urinary bladder to outside of body
urinalysis
physical and chemical examination or urine
urinalysis looks at
color, turbidity, odor, density
kidney failure
▫kidney stops effectively filtering blood
▫cause by infections, trauma, diabetes, tumors
▫s-build up of toxins, jaundice, fatigue
▫t- dialysis or transplantz
dialysis
the purification of blood by an external machine
ens
entric nervous system- system of nerves found in gut