1. Do Now: Take out notebook, homework, and pencil
Use the chemical below and describe EVERYTHING you know about it
4CO2
What is the difference between a molecule and a compound?

2. Do Now: Take out notebook, homework, and pencil
What is the path that food takes through the digestive system?
Pick THREE parts and explain what happens to the food there

3. Essential Questions:
What is the main function of the excretory system?
What are the main organs in this system?
Engagement Video

4. Glue notes on page

5. Excretory System
The main function is to filter blood and remove liquid waste from the body
Works with the circulatory, respiratory, endocrine and integumentary systems to maintain homeostasis (balance) of water, blood pressure etc.

6. Kidney (2 in body)
Main function is to filter waste products out of the blood
Blood enters through renal arteries and passes back to circulation through the renal veins
Helps endocrine system form red blood cells and the circulatory system to remove waste from blood
Renal artery
Renal vein

7. Ureters Muscular tubes that carry urine from kidneys to bladder
2 of them, one for each kidney

8. Bladder Pear shaped and holds urine Holds 400-600 mL (2.5 cups)
Emptying of bladder takes place by contraction of smooth muscles

9. Urethra
Passage way through which urine is discharged from the bladder out of the body
Longer in the male than female
About liters per day

10. Quick Action – INB Template
Excretory System INB Template 1. Label all of the organs on your template for the Excretory system
Excretory System
Function:
Main Organs:
© KeslerScience.com

11. Quick Action – Excretory System Do this on page
Look at your drawing of the excretory system. It only has four parts. Come up with a quick mnemonic to help you remember the order of the organs beginning with the kidneys.
mnemonic
© KeslerScience.com

12. Accessory Organs
Not part of the path of urine but play a part in removal of waste
Liver- filters blood from the digestive tract
Lungs- removes carbon dioxide when exhaled
Skin- secretes a fluid waste called sweat

13. Symptoms of dehydration
Excretory System
Hydration
Water makes up half of your body weight.
You lose water when you go to the bathroom, sweat, and breathe.
If you don’t replace the water you lose, you become dehydrated.
Symptoms of dehydration
Little or no urine, or urine that is darker than usual
Sleepiness or fatigue
Extreme thirst
Headaches
Confusion
Dizziness
© KeslerScience.com

14. Half of class will do reading activity
You must read, answer, AND highlight/underline where you found your answer
Other half will work on assessment sheet
7 mins and then we will switch

15. Creative Writing Assignment
Start in class and finish for homework