1. Cells & Systems The Circulatory System

2. The Circulatory System
What does it do?
Your body’s transportation network
Transports Oxygen (O)
Transports Carbon Dioxide (CO2)
Removes Waste products
Delivers nutrients

3. The Essentials The Circulatory System includes … The Heart Veins
Arteries
Capillaries

4. The Human Heart

5. The Heart It is a pump … but did you know …?
It is actually two pumps in one?
The left side & the right side!
The right side pumps blood to your lungs
The left side out to your entire body
Did you know that is why people believe your heart is on your left side?

6. The Heart Cont …

7. The Heart Cont … Left Ventricle Aorta Right Ventricle Artery to Lungs
Major vein to Lower Body
Veins to Heart
Veins to Heart
Major vein to Upper Body
Left Atrium
Right
Atrium

8. The Heart Cont … Aorta Left Ventricle Artery to Lungs Right Ventricle
Receives deoxygenated blood and pumps to right ventricle
Left Ventricle
Artery to Lungs
When it contracts pumps
blood to the lungs
Right
Ventricle
Receives oxygenated blood and pumps to left ventricle
Veins to Heart
When it contracts, pumps blood to the body
Major vein to Lower Body
Carries blood from left ventricle to body
Left Atrium
Major vein to Upper Body
Takes in deoxygenated blood from the lower body
Right
Atrium
Takes in deoxygenated blood from the upper body

9. The Heart Cont …
So now we know the parts … but what does it look like beating?
Live Echocardiogram Video

10. The Heart Cont … Random heart fact …
If you were to cut the heart open before a pump, when it pumped the pressure is so strong it could shoot blood up almost 9 meters!
9m = feet  basketball rim = 10 feet
That means it would 3 hoops tall!

11. Arteries Veins & Capillaries
Your heart pumps blood throughout the body
Through KM of blood vessels!
That could wrap around the earth times!
3 people stretching all blood vessels tied together could reach the moon!
WHAT?!

12. It looks like this …

13. Arteries Veins & Capillaries
Arteries (think red)
Carry blood (oxygenated) away from your heart and lungs to the body
Veins (think blue)
Carry blood (deoxygenated) towards your heart and lungs from the body

14. Arteries Veins & Capillaries
Blood vessels are made up of 3 different kinds of tissues
Connective (outside)
Muscle (middle)
Epithelial (inside)
Arteries in particular have a thick muscular layer? Can you think why?

15. Arteries Veins & Capillaries
Arteries in particular have a thick muscular layer? Can you think why?
Answer!...
It is what expands/contracts to push your blood along
Tiny activity time!

16. Pulse What is your pulse? Time to find it …
Your heart rate or number of times your heart beats in 1 minute
Time to find it …

17. Arteries Veins & Capillaries
Other unique features?
Veins are thinner than arteries and have special valves that stop blood from flowing backwards!

18. Arteries Veins & Capillaries

19. Arteries Veins & Capillaries
Osmosis & Diffusion play important roles in the circulatory system
Diffusion
How your blood cells pick up CO2 and O
How your body picks up/releases certain nutrients in your small intestine
These all occur in specialized blood vessels called capillaries

20. Arteries Veins & Capillaries
Capillaries are the smallest blood vessels in the body
Only 1 cell thick
So narrow blood cells can only pass through in 1 cell, single file rows
Why?

21. Arteries Veins & Capillaries

22. Blood 2nd largest connective tissue in the body Made up of 4 parts
Bones are first
Made up of 4 parts
Red blood cells
White blood cells
Plasma
Platelets
55% of Blood
45% of Blood

23. Blood Plasma Platelets Red White Blood cells are highly specialized
Red: Carry oxygen, no nucleus (more space for O) flexible
White: fight infection, eat bacteria
Platelets: stop cuts from bleeding (clotting)
Plasma: liquid portion of blood, transports nutrients, waste and CO2
Plasma
Platelets
Red
White

24. Blood
Plasma
Platelets
Red
White

25. White blood cells battle
Blood Facts
Separated Blood
Your body contains about 5L of blood or about 7% of your total body weight!
White blood cells battle

26. White Blood Cells How do they work?
White blood cells identify “protein marker” on cells which tell it good or bad
Good = keep looking
Bad = Nom nom nom!
This is why our body can reject organ donations  foreign body in our body
Cancer cells are produced in your body so they contain the same cell marker = passed by

27. Circulatory System
Intelligence Test