32.4 Excretory System Sponge # 10 1.What happens if the indigestible material in the large intestines moves through it too quickly? Too slowly? 2.When oxygen-poor blood travels to the lungs, what is the waste product it is dropping off? What is it picking up? 3.What part of the mouth uses mechanical digestion? Chemical? 4.Where does digestion start?

32.4 Excretory System 1.What happens if the indigestible material in the large intestines moves through it too quickly? Too slowly? Diarrhea Constipation 2. When oxygen-poor blood travels to the lungs, what is the waste product it is dropping off? What is it picking up? Carbon Dioxide (CO2) and water vapor Oxygen 3. What part of the mouth uses mechanical digestion? Chemical? Teeth Saliva 4. Where does digestion start? Mouth

32.4 Excretory System List any non-solid wastes in your body that comes to your mind.

32.4 Excretory System KEY CONCEPT The excretory system removes wastes and helps maintain homeostasis.

32.4 Excretory System Lungs exhale carbon dioxide and water vapor. Sweat glands in skin release excess water and salts. Kidneys filter and clean the blood to produce urine. skin lungs kidneys ureters urinary bladder urethra Nonsolid wastes are eliminated through lungs, skin, and kidneys.

32.4 Excretory System The Bladder stores urine Ammonia is the toxic product produced when the body breaks down amino acids for energy –It is removed from the body by the kidneys

32.4 Excretory System Kidneys have three basic functions in maintaining homeostasis. –remove waste from blood –help to maintain electrolyte, pH, and fluid balances –release key hormones