1. 2. What organ(s) do you think filters your blood?
Have you ever seen a water-purification system attached to a faucet? This system removes impurities from the water such as arsenic or other chemicals that can be harmful to people. As water passes through the filters contained in the system, the impurities are trapped on the surface of the filters. Eventually, the water that comes out of this purifier is free of the impurities.
1.Your body has its own system for filtering blood. Why might the blood in your body need to be filtered?
2. What organ(s) do you think filters your blood?
3. How do you think the filtered materials leave your body?

2. Excretion

3. Excretion
process of discharging waste matter from the blood, tissues, or organs

4. Excretion
Process of discharging waste matter from the blood, tissues, or organs
Helps to remove heat from the body by keeping it a constant temperature - homeostasis

5. Metabolic Wastes CO2 H20 mineral salts nitrogenous wastes
Ammonia very toxic fish
Urea moderate humans
Uric Acid low birds, reptiles

6. Waste Production in Humans
Formed During
CO2
Cellular respiration

7. Waste Production in Humans
Formed During
CO2
Cellular respiration
H20

8. Waste Production in Humans
Formed During
CO2
Cellular respiration
H20
Dehydration synthesis
Nitrogenous compounds Urea
Breakdown of Amino Acids

9. Waste Production in Humans
Formed During
CO2
Cellular respiration
H20
Nitrogenous compounds Urea
Breakdown of Amino Acids
Mineral Salts
Build up during metabolism

10. Major Understanding Elimination vs. Excretion
Removal of undigested materials which have not entered cells Large Intestine
Excretion
Removal of cellular wastes

11. Excretory Organs
Lungs
Skin
Liver
Kidneys

12. The Urinary System Artery Vein Kidney (Cross Section) Kidney Cortex
Medulla
Ureter
Urinary bladder
Urethra

13. Lungs
paired organs in the chest cavity that exchange gases oxygen and carbon dioxide

14. Lungs Function remove CO2 and water vapor Waste Removed CO2, H20
paired organs in the chest cavity that exchange gases such as oxygen and carbon dioxide
exhaling rids the body of excess water and heat
Function
remove CO2 and water vapor
Waste Removed
CO2, H20

15. Skin serves to cool (remove heat) and warm (shivering);
gets rid of waste products like salts and minerals that are in the sweat.

16. Skin Function regulates body temp by opening capillaries Waste Removed
serves to cool (remove heat) and warm (shivering); also gets rid of waste products like salts and minerals that are in the sweat.
Function
regulates body temp by opening capillaries
perspiring
Waste Removed
heat, perspiration ( water, urea, salts)

17. Liver main organ for cleansing the blood;
breakdown large proteins and filters them from the blood

18. Liver main organ for cleansing the blood;
breakdown large proteins and filters them from the blood
Function
detoxifies blood,
breakdown Amino Acids,
converts ammonia to urea,
forms bile,
breakdown old RBC’s
Waste Removed
Urea removed by Kidneys
parts of RBC

19. Kidney
remove toxins from blood; produce urine which is salts, nitrogenous wastes and water
we have two, located in the pit of the back, but can live with one (or none) as long as we are treated medically.

20. Kidney Function Wastes Produced Filter blood
Regulates concentration of substances in body fluids
Wastes Produced
Urine
water
mineral salts

21. Other Excretory Organs
Ureter
thin tube leading from the kidney to the urinary bladder
urinary bladder
very stretchy bag-like organ that stores urine prior to release (urination)
Urethra
tube leading from the urinary bladder to the outside of the body

22. The Kidney
Cortex – filters blood
Medulla – reabsorption

23. Major Function of Kidneys
Filtration
Filters out both good and bad(wastes)
Re-absorption
useful (good) substances are reabsorbed

24. Blood in tubing flows through dialysis fluid
 Kidney Dialysis
Section 38-3
Blood in tubing flows through dialysis fluid
Blood pump
Vein
Artery
Shunt
Used dialysis fluid
Air detector
Dialysis machine
Fresh dialysis fluid
Compressed air

25. Excretory Disorders
Kidney Failure
Kidney Stones
Cirrhosis