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Chapter 32: Digestive System
Transcript of Chapter 32: Digestive System
Read on your own. Answer questions 1-4.
Read on your own and answer questions 1-4.
32.2 Digestive System
Breaks down food in a large "disassembly line."
32.4 Excretory System
eliminates non solid wastes
ex sweat, urine and exhalation
Injury and Disease
Shred and grind food
salivary amylase breaks down starches and simple sugars
Process of peristalsis moves food down the esophagus.
smooth muscle churns food and mixes it with digestive enzymes
HCl and pepsin breaks down proteins
Partially digested food + enzymes in the stomach is called
Why doesn't the stomach digest itself?
stomach is not always producing enzymes
mucus layer on walls acts as protection
muscle contractions break and mix food
enzymes, bile and hormones digest proteins, sugars and fats
produced in the liver
assists in fat digestion
stored in gallbladder
empties into the duodenum
circulated by renal arteries and veins
inner layer called medula
outer layer called cortex
filters blood and creates urine
remove cellular respiration and digestion waste products from blood
Maintains water and pH balance
release hormones to maintain water balance and blood pressure
What if the kidneys stop working?
build up of waste products interferes with organs
can stop the heart
capillaries in glomerulus allows wastes to diffuse into collecting duct
water diffuses back into blood (reabsorption)
urine is produced
if a doctor is testing your urine they are looking for particles that should not be there
ex. lipids, proteins and sugars are all too large to diffuse through
finding those can be a signal of infection or injury
must be from a close relative
run the risk of rejecting the organ
recipient will be on immune suppression drugs for rest of life
avoid high contact sports
damage to only remaining kidney could result in death
treatment used with a donor kidney is not available
blood is cleaned and chemically balanced mechanically