1. Excretory System
Elimination of Wastes

2. Do Now
Based on your knowledge of body systems why do you think someone would have glucose in their urine?

4. Liver
Breaks down wastes to be excreted.
Produce urea from breakdown of proteins

5. Lungs
Elimination of waste CO2+H2O that is produced during respiration

6. Skin
Elimination of excess heat (sweat)
Sweat (Perspiration)
= Urea + H2O

7. Filter out liquid waste from the blood
Kidneys and Nephrons
Filter out liquid waste from the blood
Nephrons= millions tiny filters inside kidneys

8. Nephrons Filters bloodremoves urea, H2O, glucose, other materials
Then H2O + glucose are reabsorbed into the blood
Urea remains in the nephron= urine

10. Connects kidneys to the bladder through 2 small tubes
Ureters
Connects kidneys to the bladder through 2 small tubes

11. Sacklike muscular organ that stores urine.
Urinary Bladder
Sacklike muscular organ that stores urine.

12. Urethra
Small tube that eliminates urine from the body

14. Exit Slip: Answer on a sheet of paper to hand in.
How does the excretory system help maintain homeostasis?