Cardiovascular System

Deliver nutrients, O2, and removes waste and CO2 from cell/tissue of the body. Transports hormones, antibodies, immune cells

PH via buffer, body temp

Clotting factors (proteins), immune cells and proteins

the myocardium allows “contractile” impulses to pass from cell to cell

Atria- “receiving” chambers Ventricle (left and right)- “shipping” chambers Septum- separates heart (right and left)

right atrium - right ventricle - out to lungs (get rid of CO2 and get O2) - left atrium - left ventricle - aorta (rest of body)

receives oxygen-poor blood from the body and pumps it to the right ventricle

large, high pressure, “shipping” chambers

divides the heart into right and left halves (divides myocardium)

Closure of the valves in the heart; Atrioventricular = “lub” sound Semilunar (ventricles to system) = “dub” sound

due to “leaky” valves

Supply O2 and nutrients to the myocardium (heart muscle)

Heart Attack due to the blockage of these arteries and the lack of blood to heart

lack of blood (and O2) supply to the heart

Coronary Artery

SA node - Atria - AV node - Purkinge fibers (“heart nerves”) - Ventricles

Reflects the path of electrical conduction through the heart

determines the heart rate (dimmer switch)

abnormal rhythms, from faulty conduction pathway or (some) as a result of heart damage

SA (sino-atrial) node

Neural and hormonal substances Influence both heart rate and strength of contraction

lack of O2

Blood vessels that carry blood from the (right side) heart to the lungs and back to the (left side) heart. As the blood flows (through the capillaries) along the surface of the alveoli

Blood, partial pressure of CO2 in the blood is higher than in the alveoli.