1. The Excretory System
C15L3

2. Primary functions
the removal of wastes and foreign substances and excess substances from the blood
the temporary collection and storage of these substances
the elimination of these substances from the body
regulates the level of fluid in the body

3. The excretory system is made of four body systems.

4. Functions of the Excretory System (cont.)
The urinary system processes, transports, collects, and removes liquid waste from the body.

5. Organs of the urinary system
Kidneys
Ureters
Bladder
Urethra

6. Organs of the urinary system
The organs of the urinary system work together to process, transport, collect and excrete liquid waste.

7. Organs of the urinary system
The bean-shaped organ that filters, or removes, wastes from blood is the kidney.
The body has two kidneys, one on each side of the body, near the back wall of the abdomen, above the waste, and below the rib cage.

8. Kidney function
filter wastes from the blood and excretes them in a liquid called urine

9. Kidney
nephron: a network of capillaries and small tubes, or tubules, in the kidneys, where filtration of blood occurs.

10. Nephron
Your entire blood supply is filtered by your kidneys around 60 times each day.

11. ureters
Urine leaves each kidney through a tube called the ureter and goes to the urinary bladder

12. urinary bladder
muscular bag that temporarily stores urine

13. urethra
tube that leads from the bladder to the outside of the body

14. urethra
Urine leaves the bladder through a tube called the urethra which contains circular muscles called sphincters that control the release of urine.