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Excretory System Kidneys

Excretory System Kidneys. nutrients. sugar. CO 2. urea. O 2. nutrients. sugar. O 2. What do animal cells do to stay alive?. Animal cells move material across the cell membrane by __________________ ________________________ from digestive system ________________________

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Excretory System Kidneys

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  1. Excretory SystemKidneys

  2. nutrients sugar CO2 urea O2 nutrients sugar O2 What do animal cells do to stay alive? • 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

  3. Unicellular  Multicellular Warm, dilute ocean waters Warm, dilute ocean waters 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 • _______________________

  4. Keeping an animal alive • Had to evolve organ systems for: • getting materials in & around • ________________ • ________________ • ________________ • removing wastes • ________________

  5. H N H What liquid waste do we make? • Digesting protein makes poison • _________________________________ H | —C— | O || C—OH CO2 + H2O R ____________________________

  6. Nitrogen waste • The kind of waste you make depends on where you live • ________________ • ________________ • ________________ • ________________ • ________________ • ________________

  7. Nitrogen waste disposal in water • Freshwater animals • If you have a lot of water you can dilute the waste before it poisons you • __________________________________________________________________

  8. Nitrogen waste disposal on land • Land animals • _________________________ • _________________________ _________________________ • _________________________ • _________________________

  9. Human kidney • Mammals have a pair of bean-shaped kidneys • supplied with blood by a _______________ and a _______________

  10. Bladder

  11. 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

  12. Getting a little personal,aren’t we! 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 waste • white bird poop is really their pee! • this is why male birds don’t have a penis!

  13. Don’t be a chicken… Ask Questions!!

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