1. Excretory System

2. What does the blood carry away from body cells?
Oxygen & waste
Carbon dioxide & waste
Carbon dioxide & nutrients
Oxygen & nutrients 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

3. Functions of Excretory System
Rids blood of
wastes (urea)

4. Functions of Excretory System
Rids blood of
wastes (urea)
Controls blood
volume by removing
extra water
produced by cells

5. Functions of Excretory System
Rids blood of
wastes (urea)
Controls blood
volume by removing
extra water
produced by cells
Balances salts and
water so cells can function properly

6. Organs of the Excretory System
Renal Artery = carries blood into the kidney
Renal Vein = carries blood out of the kidney

7. Organs of the Excretory System
Kidneys = filter
blood that has
collected wastes
from cells

8. Organs of the Excretory System
Kidneys = filter
blood that has
collected wastes
from cells
Nephrons = filters
inside the kidneys
Produce urine
(sterile waste fluid,
96% water)

9. Which is not a function of the excretory system?
Removes wastes from the blood
Removes excess water from the blood
Removes carbon dioxide from the blood
Removes excess salt from the blood 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

10. What is this structure? Kidney Renal artery Renal vein Nephron 1 2 3 45 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

11. What does the renal vein carry?
Blood containing waste into the kidneys
Blood containing waste back to the body
Clean blood into the kidneys
Clean blood back to the body 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

12. What is urine mostly made of?
Water
Urea
Salt
Blood 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

13. Organs of the Excretory System
Ureters = tubes that
lead from each kidney
to bladder

14. Organs of the Excretory System
Urinary bladder =
muscular organ that
holds urine

15. Organs of the Excretory System
Urethra = tube that
carries urine from the
bladder out of the
body

16. What are the tubes that connect the kidneys to the bladder called?
Nephrons
Arteries
Urethras
Ureters 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

17. What is this structure? Ureter Urine Bladder Urethra 1 2 3 4 5 6 7 8 910 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

18. Where is urine stored until the body is ready to eliminate it?
Kidneys
Ureters
Bladder
Urethra 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

19. Other Excretory Organs
Skin = releases
perspiration (water
& salts) to cool off
body

20. Other Excretory Organs
Lungs = release carbon dioxide from the body

21. Which statement is true about excreted substances?
Water can only be removed by the kidneys.
Excess salt can be removed by the kidneys & skin.
Blood carries all waste products to the lungs to be removed from the body.
Carbon dioxide can be excreted by the skin. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

22. Which system does not include an excretory organ?
Excretory system
Integumentary system
Cardiovascular system
Respiratory system 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30