How do they keep homeostasis?
1. Keeping blood levels of these things (water, salts) stable
2. keeping body temp. stable
3. keeping ph levels stable
ingest, filter, parasites
both sexually and asexually, and some only sexually
some are thin enough to use diffusion, some need complex systems using lungs or gills
system of nerve cells and sometimes a brain to detect smell sound, pain, pressure, heat, light
some are sessile (remain in one spot) most are motile ( move around)
(transport food, waste, 02) some are thing enough to use diffusion, most have complex systems using a heart
(releases nitrogenous waste) some are thin enough to use diffusion, most use kidneys and skin
(invertebrates) sea anemone, jelly fish, extra cellular, 2 way, gastrovascular cavity, diffusion (no system)
(invertebrates) plinaria, extracellular, 2 way, gastrovascular cavity, diffusion (no system)
(invertebrates) leech, earth worm, extracellular, 1 way, single loop, closed circulatory, several hearts
food is digested inside of cells, sponges
food is digested outside cells, then absorbed into cells
benefit of extracellular
allows animals to eat a variety of foods, specifically larger foods
area inside animal's body where cells secrete enzymes to chemically digest and absorb food, always 2 way
chewing, mechanical digestion
chemical digestion in the mouth
enzyme amylase breaks down starch to sugars
muscular contractions called peristalsis
push food down to stomach past the cardiac sphincter
flap of cartilage that covers the trachea during swallowing so that food doesn't enter lungs
heart burn vs GERD (reflux)
stomach ACIDS back up and irritate e. l./stomach CONTENTS back up and irritate e. l.
mechanical digestion in stomach
stomach contracts/ churns food
chemical digestion in stomach
HCL lowers the pH to activate the enzyme pepsin for breakdown of proteins
the heart's pace maker is the (location too)
sa node located in the R atrium
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