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

Blood Vessels and Circulation EQ: How does blood flow throughout our bodies?. Root Words. Veins and Arteries have 3 wall layers. Intima - Inner layers Media - Middle Layer Adventitia - Outer layer. Veins and Arteries. Arteries : Carry blood away from the heart

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

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

  2. Root Words

  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

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

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

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

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

  10. 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

  11. 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)

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

  13. 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

  14. ECG • AKA Electrocardiography

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

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

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

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

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

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

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