Circulation
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Cardiovascular
- Cardiovascular Overview
- CO2 Transport
- Heart
- Cardiac Impulse
- Blood Pressure
- Arteries and Arterioles
- Veins and Venules
- Capillaries
- Circulation
- Blood
- Hemoglobin
- Blood Clotting
- Circulation
- Path of blood flow: Atrium → ventricle → artery → arteriole → capillaries → venules → veins → other atrium
- Pulmonary (lung) circuit
- Starts in right atrium and ventricle
- Pulmonary arteries carry blood to lung to be oxygenated
- Deoxygenated (low O2)
- High CO2
- Pulmonary veins return oxygenated blood to heart (left atrium)
- Low pressure system
- Right ventricle has thinner walls than left ventricle, since it needs to generate less pressure
- Systemic (body) circuit
- Starts in left atrium and ventricle
- Arteries carry blood to body tissues to supply nutrients and oxygen
- Oxygenated (high O2)
- High CO2
- Veins carry deoxygenated blood back to heart
- Empty into (superior and inferior) vena cavae, which empties into right atrium
- High pressure system
- Left ventricle has thicker/stronger muscular wall, as systemic circulation has higher pressure