1. Excretory System – Learning Outcomes
State the function of the urinary system.
Name the products of excretion.
Describe the structure of the urinary system.
Recall that urine is stored in the bladder.
HL: Describe the function of the kidneys in filtering the bloodstream.
HL: Describe the function of the skin in excretion.

2. Excretion Excretion is the removal of waste products from the body.
The products of excretion are carbon dioxide, water, salts, and urea.

3. Excretory System
by Jordi March i Nogué – CC-BY-SA-3.0

4. Excretory System Renal Artery
Carries blood from the body to the kidneys
Kidney
Removes water, salts, and urea from blood, forming urine.
Renal Vein
Carries filtered blood from kidneys to heart.
Ureter
Carry urine from kidneys to bladder
Bladder
Stores urine.
Urethra
Carries urine from bladder to outside the body.

5. The Kidneys
Waste products are removed from the bloodstream by filtration in the kidneys.
The waste products are combined to form urine.
Urine contains water, urea, salts.
by ThorRune – public domain

6. The Skin
Water and salts are excreted through the skin as sweat.