1. The Heart and Circulatory System; The Basic Functions

2. What are the main parts of the Circulatory System?

3. What’s on the exterior of the heart?
Coronary Arteries
These provide the heart muscle with oxygen rich blood.

4. The Heart
Found in the thoracic cavity, between the lungs and slightly to the left.
It is the size of a large fist.
Contains 4 chambers
Atrium (right & left)
Ventricle (right & left)
It has 2 pumps:
Right side: Pulmonary Circulation (lungs)
Left side: Systemic Circulation (body)

5. Pulmonary (LUNGS) Circulation Systemic (BODY) Circulation

6. Pulmonary (LUNGS) Circulation
The right side of the heart pumps deoxygenated blood to the lungs.
The left side receives oxygenated blood.

7. Systemic (BODY) Circulation
The left side of the heart pumps oxygenated blood to the body.
The right side of the heart receives deoxygenated blood.
Reinforcement Video:

8. Which side of the heart is larger? Why?
The right side pumps blood to the lungs.
The left side pumps blood to the entire body.
So Which side will require more power?
The left  so it is thicker & has more muscle

10. Where does the
blood flow?

11. ______________________

12. 1 2 4 3 5 7 6 8 9 Aorta Pulmonary Arteries Superior Vena Cava
Pulmonary Veins
Right Atrium
Right AV valve (tricuspid)
Pulmonary Valve
Right Ventricle
Inferior Vena Cava 1 2 4 3 5 7 6 8 9

13. 10 11 12 13 14 Left Atrium Left AV Valve (bicuspid or mitral)
Aortic Valve
Left Ventricle
Septum 10 11 12 13 14

14. An Exception! Arteries Carry oxygenated blood away from the  BUT
The Pulmonary Arteries carry deoxygenated blood away from the 
Veins
Carry deoxygenated blood to the 
BUT
The Pulmonary Veins carry oxygenated blood to the 
Reinforcement Videos:

15. Heart Beat The heart makes 2 sounds as it beats: “Lub-Dub”
The sounds are caused by the closing of the valves
“Lub”  closing of both AV valves
“Dub”  closing of the aortic & pulmonary valves
The valves are supported by tendons.

16. Chordae Tendinae

17. Heart Rate (feel your pulse)
Heart Rate is the number of times  beats per minute
Average rate varies  age, gender, and health
~70 beats/min
A healthier person has a larger heart and a slower heart rate

18. Factors that can cause the  rate to speed up:
Physical activity
Emotions (fear, excitement)
Chemicals (ex: adrenaline, tobacco)

19. Synergy Textbook Work Functions of Blood Constituents:
- READ pgs. 99 – 103
- Questions 1 – 4 pg. 119
The Anatomy of the Circulatory System:
- Read pgs. 107 – 111
- Questions 5 – 7 pg. 120.

20. Human Body Project