1. Application/Connection: Excretory System Ws Tu
171
Excretory System Notes and Ws
172
Excretory System Notes and Ws
2/18/15
2/18/15
Starter:
Application/Connection:
 Excretory System Ws Tu
Practice:
Glue notes here
Exit:
Explain some of the ways the body rids itself of waste.

2. Breaking down of food into simple substances
Mouth
esophagus
Breaking down of food into simple substances
stomach
Small intestine
Large intestine
Anus

3. 1. Starter
Excretory System Notes
Excretory System Ws
February 18, 2015 AGENDA Objective 7.12 B Identify the main functions of the systems of the human organism, including the circulatory, respiratory, skeletal, muscular, digestive, excretory, reproductive, integumentary, nervous, and endocrine systems by completing a skeletal system worksheet

4. Table of Contents Date Lecture/ Activity/ Lab Page
2/ Digestive System Notes and Ws
2/ Exretory System Notes and Ws

5. The Excretory System

6. Excretory System Why do our bodies need to filter waste from the body?
Maintain homeostasis
Removal of harmful materials
Removal of excess fluids, chemicals, minerals, vitamins, salts, and other wastes from the blood

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

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

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

12. Where is urine stored until the body is ready to eliminate it?
Kidneys
Ureters
Bladder
Urethra

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

14. Functions of Excretory System
Controls blood
volume by
removing
extra water
produced by cells

15. Functions of Excretory System
Balances salts and water so cells can function properly

16. 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

17. Other Excretory Organs
Skin = releases perspiration (water
and salts) to cool off the body

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

19. Application/Connection: Excretory System Ws Tu
171
Excretory System Notes and Ws
172
Excretory System Notes and Ws
2/18/15
2/18/15
Starter:
Application/Connection:
 Excretory System Ws Tu
Practice:
Glue notes here
Exit:
Explain some of the ways the body rids itself of waste.