1. P.S. S7L2- Students will be able to describe the structure and function of cells, tissues, organs, and organ systems.
E.Q. - How does the Digestive and Excretory Systems aid us in maintaining our bodies homeostatic environment.

2. Science class today:
 Check and go over chapter 24.1 homework for a review of digestion. 
Watch short video from united streaming on how the digestive system. 
Guided reading notes 24.2 on excretory system completed.
 Chapter review questions 1-15 on p. 648.
Closing- TOTD paragraph describing how the Excretory System helps us maintain homeostasis
HW- Chapter 24 quiz next day and you need to complete Excretory System review worksheet

3. Homework: The Digestive Process
Break Down Food.
Absorb food molecules into the blood.
Eliminate Wastes.
Esophagus
Stomach
In mechanical digestion, food is ground into small pieces. In chemical digestion, large food molecules are broken into small molecules by enzymes.

4. Homework: The Digestive Process
7. Epiglottis
8. Mucus
9. Absorption
10. Peristalsis
11. Stomach
12. Esophagus
13. Saliva
14. Digestion
15. Enzyme

5. Homework: Final Digestion
Small Intestines
Large Intestines

6. Homework: Final Digestion
9. The water is absorbed into the bloodstream.
Fiber makes the fluid in the intestines thicker and easier to move forward.
D C
A G
F B E

7. Guided Rdg 24.2: The Excretory System
Draw and Label the organs of the urinary system in Fig. 1 p. 642

8. Draw and label the Kidney in Fig. 2, p. 643

9. Describe how the Kidney filters blood:
A large artery brings blood into each kidney.
Tiny blood vessels branch off the main artery and pass through the part of each nephron.
Water and other small substances (glucose, salts, amino acids, and urea) are forced out of the blood vessels and into the nephrons.
As these substances flow through the nephrons, most of the water and some nutrients are moved back into the blood vessels that wrap around the nephrons. A concentrated mixture of waste materials is left behind in the nephrons.

10. Describe how the Kidney filters blood:
The cleaned blood, which has slightly less water and much less waste material, leaves each kidney in a large vein to recirculate in the body;
The yellow fluid that remains in the nephrons is called urine. Urine leaves each kidney through a slender tube called the ureter and flows into the urinary bladder, where urine is stored.
Urine leaves the body though another tube called the urethra. Urination is the process of expelling urine from the body.

11. (this is also the EQ on your classwork sheet)
Closing: TOTD
How does our excretory system (or urinary system) assist to maintain our body’s homeostatic environment?
(this is also the EQ on your classwork sheet)