1. Blood Vessels and Circulation EQ: How does blood flow throughout our bodies?

2. Root Words Brady Slow Bradycardia Diastol Dilation Diastolic pressure
-gram
Something written
Electrocardiogram
Tachy
Rapid
Tachycardia
Systol
Contraction
Systolic pressure

3. Veins and Arteries have 3 wall layers
Intima- Inner layers
Media- Middle Layer
Adventitia- Outer layer

4. Veins and Arteries Arteries: Carry blood away from the heart
Veins: Return blood to the heart

5. Other vessels Arterioles: Are the smallest branches of arteries
Capillaries: Smallest blood vessels, serve to distribute oxygenated blood from arteries to tissue around the body
Venules: Small blood vessels that merge with veins and return blood from tissue to the heart

7. Capillary Beds
Collection of capillaries where oxygen is exchanged through diffusion.

8. Venous Valves
Folds within veins which prevent blood from flowing backwards
Compression pushes blood toward heart
Video

9. Factors affecting blood flow
Blood Pressure (BP)
Arterial pressure to overcome resistance

10. Factors affecting blood flow
Blood Pressure (BP)
Arterial pressure to overcome resistance
Venous Pressure
Pressure in the venous valves

11. Factors affecting blood flow
Blood Pressure (BP)
Arterial pressure to overcome resistance
Venous Pressure
Pressure in the venous valvues
Vascular Resistance
Due to friction between blood and vessel walls
Depends on vessel length and vessel diameter

12. Pressures Systolic Pressure
The blood pressure when the heart is contracting
When measuring blood pressure, it is the first number (120/80) mm Hg (Millimeters of mercury)

13. Pressures Diastolic Pressure The second number (120/80)
The time when the heart is relaxing and dilating.
The second number (120/80)

15. Adjusting flow of blood
Vasodilators
Accelerate blood flow at the tissue level by widening blood vessels
Vasoconstrictors
Decrease blood flow to tissue by narrowing blood vessels
Often used on heart attack patients

16. ECG
AKA Electrocardiography

17. ECG Waves
Ions are released to polarize and depolarize, causing muscle contraction

18. ECG Waves
P Wave-
Artia are contracting, pumping blood into ventricles

19. ECG Waves P Wave- QRS Complex
Artia are contracting, pumping blood into ventricles
QRS Complex
Represents ventricular depolarization and contraction

20. ECG Waves P Wave- QRS Complex
Artia are contracting, pumping blood into ventricles
QRS Complex
Represents ventricular depolarization and contraction

21. ECG Waves P Wave- QRS Complex T Wave
Artia are contracting, pumping blood into ventricles
QRS Complex
Represents ventricular depolarization and contraction
T Wave
Represents ventricular repolarization

24. LEFT SIDE ACTIVITY Draw a vein and label the three wall layers.
Draw a ECG wave and explain what is occurring.