1. Anemia - Symptoms and Treatments
Circulation has two systems: pulmonary circulation, from heart to lungs and back, and systemic circulation, from heart to body tissues and back. Arteries carry blood away from heart Veins carry blood back to heart Arteries become arterioles which become capillaries Capillaries is where exchange of nurtients, gases, and waste occurs Capillaries drop off carbon dioxide to be exhaled and leave with oxygenated blood Veins have thinner walls than arteries, have valves, are more numerous, hold more blood than arteries. Blood in veins is deoxygenated and has higher levels of CO2 Veins carry DeO2 ...