1. Aim: How is blood transported around the body?

2. Pulse
When you take someone's pulse you are feeling the expansion and relaxation of an artery.
A normal RESTING pulse = about 70 beats/minute

3. The body of an adult contains over 60,000 miles of blood vessels.
Weird Scientific Fact
The body of an adult contains over 60,000 miles of blood vessels.

4. Active and Passive Transport
The process by which substances (nutrients, oxygen, and wastes) move into and out of the cell.
How does material cross the plasma membrane of a cell?
Active and Passive Transport

5. Circulatory System The circulatory system serves to transport
Nutrients(ex. glucose)
Gases(oxygen and carbon dioxide)
Hormones
wastes away from the cells
And Protects the body from infection.

6. Types of vessels
Arteries
Veins
Capillaries

7. Arteries -They carry blood AWAY from the heart.
-Walls are thick and elastic.
-Very muscular
-Carry Oxygenated Blood (bright red)

8. Weird Scientific fact
The human heart creates enough pressure when it pumps out to the body to squirt blood about 30 feet.

9. Veins
Thin walled, and have LITTLE muscle
Veins have VALVES
RETURNS blood to the heart.
Carries deoxygenated blood

10. -They are microscopic (1 cell thick) -Materials are exchanged through
Capillaries
-Where arteries and veins connect.
-They are microscopic (1 cell thick)
-Materials are exchanged through
thin walls.
-Carries oxygen & nutrients to all
tissue, and CO2 and waste away.

12. Chemical Exchange: Blood & Body Tissue
Interstitial fluid (Intercellular Fluid)- liquid solution that
surrounds the cells of our bodies.
CO2
CO2
CO2
CO2
CO2
CO2
CO2 O2 O2 O2 O2 O2 O2 O2 O2 O2

13. Interstitial Fluid and Lymph
The watery fluid that surrounds all cells.
Anything diffusing into cells must diffuse through the interstitial fluid.
Interstitial fluid is called LYMPH when it enters lymphatic vessels before it gets back into the blood.

14. Lymphatic System: 1) Collects and returns much of the
interstitial fluid back to the circulatory
system.
2) Has lymphatic vessels.
3) Lymph Nodes- located at certain points
throughout the lymphatic system. They
contain immune cells which help the
body fight off infections.