1. Our body’s most important substance
Blood
Our body’s most important substance

2. Blood: The Parts Plasma Red Blood Cells (Erythrocytes)
White Blood Cells (Leukocytes)
Platelets

3. Blood: The Plasma Makes up 55% of blood Mostly water
Yellowish in color
Plasma proteins:
Regulate blood volume
Transport substances
Help with clotting

4. Blood: Red blood cells Called erythrocytes Most numerous blood cells
Job is to CARRY OXYGEN
RED = HOLDING OXYGEN
BLUE = GAVE OXYGEN TO CELLS
Hemoglobin: Very special protein
Contains IRON (HEME!)
Binds oxygen in lungs
Neat fact: RBC’s do not have a nucleus!

5. Blood: White Blood Cells
Called leukocytes
Much less abundant but LARGE
Different types
Ex. Phagocytes
Job:
Work with immune system to attack foreign baddies

6. Blood: Platelets Work with plasma proteins to help CLOT BLOOD
Become “sticky” when blood vessel is broken

7. Platelets: The Video Clip

8. Blood Types Each contains different proteins 4 blood types:
Makes donating and receiving blood complicated!
4 blood types:
Type A: contains “A” protein
Type B: contains “B” protein
Type AB: contains both “A” and “B” proteins
Type O: contains NO proteins

9. Blood Types: Donating and Receiving
Type A:
Donates to: A AND AB
Receives from: A or O
Type B:
Donates to: B AND AB
Receives from: B or O
Type AB:
Donates to: AB only
Receives from: A, B, AB, or O
UNIVERSAL RECIPIENT!
Type O:
Donates to: A, B, AB, or O
UNIVERSAL DONOR!
Receives from: O only