1. PP
EXCRETORY SYSTEM

2. FUNCTION Every cell in the body produces metabolic waste.
The skin, lungs, and kidneys make up this system.

3. SKIN (Integumentary System)
Excretes water, salts, small amounts of nitrogenous wastes

4. Lungs
Excrete water vapor and CO2

5. URINARY SYSTEM Formation and excretion of urine
Mostly water to keep wastes dissolved and easier to excrete (nitrogenous waste).

6. Step 1: FILTRATION
Blood forced into kidneys to clean out urea (created in liver), toxins, mineral salts, and water to form urine.

7. Step 2: REABSORPTION
Some substances return to blood to maintain balance (through vena cava/vein)

8. Step 3: ELIMINATION
Urine passes through the ureters to be stored in bladder until it is secreted through the urethra

9. URINE
Normally made of urea, water, salt and has a very light yellow color

10. WHAT URINE TELLS US
Proteins may leak into the urine if the kidney is damaged
Too dark in color indicates dehydration
Brown color indicates bleeding from the kidneys
Urine will have a high glucose count if the individual is diabetic
Low or no glucose indicates hypoglycemia, which results from too much insulin

11. Assignments Class Work: Finish Digestion mobile
HW: Coloring pages 4-5 and Digestion Lab due tomorrow!