1. Circulation: Getting from
here to
There

2. Introduction to the Circulatory System
As a life function  system
TRANSPORT
Immune factors
nutrients
hormones
O2/CO2
wastes

3. A CLOSED circulatory system has 3 basic parts
1. A pump
3. Something to pump
(Heart)
2. Some tubes
(blood Vessels)
There will be…
(Blood)

4. An OPEN circulatory system
…is missing one of those components.

5. These are a little more reasonable…

6. Open vs. Closed (circulation)

7. Circulatory Plumbing Blood Vessels
No beginning or end, so since we have to start somewhere…

8. Arteries Carry blood AWAY from heart Thick, elastic, muscular walls
Have a pulse
Gradually become smaller as they get farther away from the heart until they become arterioles

9. Body cells Environment
Capillaries
Tiny, tiny, tiny (only a few blood cells at a time)
Very thin walls  “leaky”
Exchange of material
Blood
Body cells Environment

10. Capillaries Plasma portion of blood is “squeezed out”
Becomes “Intercellular fluid”
Some reenters capillaries, a lot is collected by lymphatic system

11. Veins Blood TO heart Thinner walls (than arteries)
Have valves for one-way flow
No pulse

13. The LYMPHATIC System The tubes you never hear about
Have their own capillaries and veins
Collect intercellular fluid in their capillaries
ICF returned to circulatory veins by the Lymphatic veins