Blood Vessels
Blood Vessels
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Endothelium is a thin layer inside of the blood vessels
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Oxygenated Blood
- Arteries
- Carry blood away from heart
- Arterioles
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Blood is distributed to all body tissues
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Arterioles distribute blood to all the body tissues. Exception: Pulmonary Artery
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Exception: Pulmonary Artery
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- Arteries
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Deoxygenated blood
- Capillaries
- Exchanges gas
- Veins and Venules
- Returns blood to heart
- One way valves ^[Varicose Veins]
- What are the one way valves in veins called ;; Varicose Veins
- Assisted by
- Skeletal Muscle Pump
- Muscles that help the blood up.
- Increases Blood Pressure to move it up as well.
- Thoracic Pump
- Breathing decreases pressure in the thoracic cavity, and increases pressure in the abdominal cavity which moves from low to high pressue to move the blood up.
- Venoconstriction
- Vein constriction
- If cardiac output needs to increase, it constricts the veins and also helps the blood move from high to low pressure.
- What assists veins in returning blood to the heart? ;; Skeletal Muscle Pump, Thoracic Pump and Venoconstriction.
- Skeletal Muscle Pump
- Exception: Pulmonary Vein
- Capillaries
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What is in our Blood Vessels?
- Plasma 55%
- 90% Water
- 7% Plasma Proteins
- 3% Acids and salts
- Blood Cells
- Erythrocytes ;; Red Blood Cell
- Leukocytes ;; White Blood Cells
- Thrombocytes ;; Platelets
- Plasma 55%