1. Circulatory System
Arteries = blood vessels that carry blood AWAY from the heart (red on diagrams)
Capillaries = tiny blood vessels that allow the exchange of gases, nutrients, hormones, and other molecules in the blood
Veins = blood vessels that carry blood BACK to the heart (blue on diagrams)

2. Circulatory System
A valve is a one- way flap of tissue that ensures that the blood or fluid that passes through does not flow back.

3. Summary of Blood Flow 1. Superior Vena Cava (upper body) and
Inferior Vena Cava (lower body) – sends oxygen poor blood to the right atrium
2. Right Atrium – sends blood to the right ventricle
- Through the tricuspid valve
3. Right Ventricle – sends blood to the pulmonary artery
4. Pulmonary Arteries - sends blood to the lungs to become oxygenated

4. Summary of Blood Flow
5. Pulmonary Veins – returns blood to the left atrium from the lungs
6. Left Atrium – sends blood to the left ventricle
- Through the Bicuspid/Mitral Valve
7. Left Ventricle – sends blood to the aorta
8. Aorta – sends blood to the coronary arteries, the brain, and the rest of the body (sends fresh oxygen to body)

5. Tricuspid valve
Bicuspid valve
Apex

6. Aorta: to upper body
Pulmonary Artery
To Left Lung
Superior Vena Cava
Pulmonary Artery
To Right Lung
Pulmonary Veins
From Right Lung
Pulmonary Veins
From Left Lung
SA Node
Pulmonic Valve
AV Node
Left Atrium
Right Atrium
Bicuspid/Mitral Valve
Tricuspid Valve
Aortic Valve
Right Ventricle
Inferior Vena Cava
Left Ventricle
Septum
Apex
Aorta: to lower body

7. Section 37.2 Summary – pages 975-984
The passage of blood
Superior vena cava
Pulmonary artery
Aorta
Pulmonary vein LA RA LV RV
Capillaries
Inferior vena cava
Left lung
Right lung
Section 37.2 Summary – pages

8. 130 (systolic) / 90 (diastolic) = good reading in adults
Sinoatrial Node (SA/ Pacemaker) = contraction of the heart is initiated by a small cluster of cardiac muscle cells
Blood Pressure – is the force exerted by blood as it moves through blood vessels
130 (systolic) / 90 (diastolic) = good reading in adults

9. Disorders of the Heart
Heart attack occurs when an area of the heart muscle stops working and dies
***NOTE:
Stroke is when an area of the brain dies