2008-2009 AP Biology

Excretory SystemKidneys

Regents Biology

Animal cells move material across the cell membrane by __________________ ________________________

from digestive system ________________________

from digestive system ________________________

from respiratory system ________________________

CO2, urea from cells to respiratory system & excretory system

What do animal cells do to stay alive?

O2

sugar

sugar nutrients

CO2

urea

nutrients

O2

Regents Biology

Unicellular Multicellular

• All cells in direct contact with environment• All cells can easily get

nutrients in & waste out by __________________

• Internal cells not in direct contact with environment• Internal cells can’t get

nutrients in & waste out• _______________________

Warm, diluteocean waters

Warm, diluteocean waters

Unicellular Multicellular

Regents Biology

Keeping an animal alive Had to evolve organ

systems for: getting materials in &

around ________________ ________________ ________________

removing wastes ________________

Regents Biology

What liquid waste do we make? Digesting protein makes poison

_________________________________

O ||C—OH

H|

—C—|R

CO2 + H2O

____________________________

H

HN

Regents Biology

The kind of waste you make depends on where you live ________________

________________ ________________

________________ ________________

________________

Nitrogen waste

Regents Biology

Nitrogen waste disposal in water Freshwater animals

If you have a lot of water you can dilute the waste before it poisons you _________________________________

_________________________________

Regents Biology

Nitrogen waste disposal on land Land animals

_________________________ _________________________

_________________________ _________________________

_________________________

Regents Biology

Human kidney Mammals have a pair of

bean-shaped kidneys supplied with blood by a _______________

and a _______________

Regents Biology

Bladder

Regents Biology

Nitrogen waste disposal in egg Egg-laying land animals

no place to get rid of waste while in egg needs waste that doesn’t dissolve in water

inside egg ____________________________ stays a powder, doesn’t dissolve in water

birds, reptiles, insects

Regents Biology

Uric acid Bird & reptile waste

large molecule that doesn’t dissolve in water inside egg

stays as a white powder doesn’t harm embryo in egg adults excrete white paste

not liquid wastewhite bird poop is

really their pee! this is why male birds

don’t have a penis!

Getting a little personal,

aren’t we!

2008-2009 AP Biology

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