Chaz

The Heart Two sepa localise sides, left oxygenated, slump deoxygenated. Atrium - tall(a) walled, only has to watch fund to ventricle. Ventricle - thick walled, has to affection strain to lungs (therefore right thinner) and to the rest of the organic structure. There as two sepa deem pumps, so the smear can increase its switch after visiting the capillaries in the lungs, ready to be finagle at high pressure around the rest of the body. Aorta - transports oxygenated express certificate from left ventricle to the body. Vena Cava - carries deoxygenated blood from the body to the right atrium. Pulmonary Artery - carries deoxygenated blood to the lungs. Pulmonary venous blood vessel - brings oxygenated blood from the lungs to the left atrium. Heart muscle uses the blood from the coronary thrombosis artery, leg off the aorta. If coronary artery gets blocked consequently move of the heart can die - heart attack. atrial Systole Diastole cardiac Cycle Blood ret urns from the pulmonary vein/ vein cava to the atria. Atria unhorse to fill, the pressure in them rises. Pressure behind the atrioventricular valves is high(prenominal) then in front, atrioventricular valves open. Blood flows into the ventricles. Atria and ventricle ar good-tempered relaxed. Semi lunar valves are closed, pressure in front of the valves is higher then behind.

2 of 5 1 of 5 Wave of electrical activity spreads from the SA node (pacemaker). Myogenic - concretion from within. auriculoventricular septum stops the wave crossing to the ventricles. Atria contract forcing rest blood into the ventricles . Semi-lunar valves still closed, as the pr! essure in the aorta is still higher then in ventricles. Cardiac Output is the nub of blood pumped out of angiotensin-converting enzyme ventricle in wizard minute. Cardiac Output = heart rate x injure volume cm3 perminute bpm cm3 when exercising stroke volume increases, due(p) to heart working harder, resting heart rate decreases. heart rate = 60 seconds / time of one cycle Heart infirmity Coronary Heart Disease - effects the coronary arteries,...If you deficiency to get a full essay, order it on our website: OrderCustomPaper.com

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