1. Unit 2: Cells and Systems
Topic 3: The Circulatory System

2. The Circulatory System
The main purpose of the Circulatory System is to:
Transport oxygen and carbon dioxide
Transport and deliver nutrients
Remove waste products
The Circulatory System is composed of:
The Heart
Veins
Arteries
Capillaries
Do you even lift Bro?

3. The Heart Let’s get to the heart of the matter…….get it? ;)
The heart pumps blood through your body
It is actually two pumps in one, talk about bang for your buck.
And each pump has Two chambers!
2x2=4, which means the heart has four chambers!

4. The Heart

5. The Heart

6. The Heart
The right side of the heart pumps blood to the lungs and consists of the Right Atrium and the Right Ventricle
Right Atrium pumps blood from the body into the Right Ventricle
Right Ventricles pump blood to the lung
The goal here is to take blood low in oxygen, high in carbon dioxide and to bring it to the lungs, where it exchanges carbon dioxide for oxygen
The left side of the heart pumps blood to the body and consists of the Left Atrium and the Left Ventricle
Left Atrium pumps blood from the lungs into the Left Ventricle
Left Ventricle pumps blood into the body

7. The Heart
Basically:
Right side of the heart is in charge of the lungs
Left side of the heart is in charge of the body
The heart is so strong, it pumps blood through 100, 000 Km of blood vessels
That is like running from one side of Canada to the other and back five times
If three people decided to untangle all their blood vessels and carefully stich them together, you could reach the moon!
The heart Works so hard, if you cut open before it pumps, it would shoot the blood up nearly 9 meters! That’s pretty hardcore

8. Live Action Heart Heart Beating
1:20

9. Arteries, Veins and Capillaries
Arteries (think red)carry blood (oxygenated) away from your heart and lungs to the body
Veins (think blue) carry blood (deoxygenated) towards the heart and lungs, from the body

10. Arteries, Veins and Capillaries
Blood vessels are made up of 3 kinds of tissues
Connective tissue (outside)
Muscle (middle)
Epithelial (inside)
What might be the purpose of the thick muscular layer for Arteries?

11. Arteries, Veins and Capillaries
Blood vessels are made up of 3 kinds of tissues
Connective tissue (outside)
Muscle (middle)
Epithelial (inside)
What might be the purpose of the thick muscular layer for Arteries?
Expands and contracts to push
your blood through your body
AKA your pulse

12. Arteries, Veins and Capillaries
Lets test it out
What is your pulse?
Your heart rate is the number of times your heart beats in a minute.

13. Arteries, Veins and Capillaries
How do Veins function?
Carry deoxygenated blood back to your lungs
Have valves to stop blood flowing backwards

14. Arteries, Veins and Capillaries
When the valves don’t function properly…..Varicose Veins

15. Arteries, Veins and Capillaries
Capillaries allow oxygen to exit the blood to important tissues and absorb carbon dioxide to take back to the lungs. This is done through Diffusion.

16. Arteries, Veins and Capillaries
Capillaries are just one cell thick!

17. Blood
Blood is the second largest connective tissue in the body! (Bones are the largest)
Blood consists of:
Red blood cells (carry oxygen and carbon dioxide)
White blood cells (fight off infection)
Platelets (tiny cells that clot your blood to stop bleeding)
Plasma ( is 55% of total blood basically a liquid that suspends the blood and also carries carbon dioxide)

18. Blood If you like Spiderman as much as I do, remember this guy?
The Vampire Morpheus required Plasma, because blood wasn’t okay to say on a kids show haha

19. Blood Ever wonder why tattoos are permanent?
White blood cells try to eat the ink molecules but they are too big and just sit there in your skin!

20. Blood
Plasma
Platelets
Red
White