EXCRETORY SYSTEM
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What do animal cells do to stay alive?
Moves materials across the cell membrane through diffusion
What are some things that keep animal cells alive?
Nutrients, fuel/sugar for energy, oxygen, waste comes out
Urea
Waste compound produced by the body after breaking down proteins
How do unicellular survive?
Relies on direct contact which helps them easily get nutrients in and waste out
How do multicellular survive?
Relies on a system of organs to obtain nutrients and get waste out
What kind of systems helps get materials in and around?
Digestive, respiratory, circulation
What systems help remove waste?
EXCRETORY, respiratory, digestive
What is our wast made of?
nitrogen makes ammonia which makes poison
Freshwater Nitrogen Waste
Ammonia
Land Nitrogen Waste
Urea
Land Egg Layer Nitrogen Waste
Uric Acid
How does nitrogen Waste differ?
It depends on where you live
Human Kidney
A pair of bean-shapes that filter waste from blood to make urine
What gets filtered out?
urea, sugar, salts, water, toxins from food to make urine (what doesn’t get filter is cells and proteins)
What is the process of the Kidney’s filtration?
Filters urea out from the blood (continuous) before re-absorbing non-waste back into the blood
What makes urine?
Urea and Water
When is active transport used?
During most re-absorbed parts requiring energy
What is not re-absorbed
Nitrogenous wastes and excess water
What is the order of the organelles in the excretory system?
Kidney-ureter-bladder-urethra
Ureter
Transfers urine from the kidney to the bladder
Urethra
Transfers urine from the bladder to the outside of the body