AP Biology Excretory System Kidneys
Regents Biology Animal cells move material across the cell membrane by _____________ ____________________ from digestive system ____________________ from digestive system ____________________ from respiratory system ____________________ CO 2, urea from cells to respiratory system, to excretory system What do animal cells do to stay alive? O2O2 sugar nutrients CO 2 urea nutrients O2O2
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, dilute ocean waters Warm, dilute ocean waters One-celled 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 __________________________________ H CO 2 + H 2 O ________________________ H H N C—OH || O H | —C— |
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 renal artery and a renal vein
Regents Biology Bladder
AP Biology Don’t be a chicken… Ask Questions!!