1. EXCRETORY SYSTEM

2. FUNCTIONS OF THE EXCRETORY SYSTEM
Provides a way for wastes to be removed from the body.
waters
salts
nitrogen wastes (urea)
drugs and poisons
The removal process is called…… EXCRETION

3. PARTS OF THE EXCRETORY SYSTEM
Kidneys
Nephrons
Ureter
Urinary Bladder
Urethra
“Helper Organs”
Liver
Skin

4. KIDNEY Filters wastes out of the blood Maintains homeostasis
Acid-base balance
Blood pressure
Outer section of kidneys has little filter factories called nephrons

5. NEPHRON Filters the blood in the kidneys
It reabsorbs what is needed and excretes the rest as urine.
Capsule: cup shaped structure in the nephron

6. URETER Tube that connects the kidneys to the bladder
Passageway for urine to go to the bladder

7. URINARY BLADDER
Muscular sac that stores urine

8. URETHRA
Passageway from bladder to the outside of the body to get rid of urine

9. “HELPER ORGANS” Liver: acts as a filter Skin:
Gets rid of unneeded amino acids
Can turn poisons into harmless substances
Skin:
contains sweat glands that get rid of excess salts, water and urea
Helps to maintain proper body temperature

10. SKIN Dermis: inner layer Epidermis: outer layer Blood vessels
Sweat glands
Oil glands
Hair follicles
Epidermis: outer layer

11. EXCRETORY SYSTEM