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The Heart Two sepa localise sides, left oxygenated, slump deoxygenated. Atrium - tenuous walled, only has to watch fund to ventricle. Ventricle - thick walled, has to kernel strain to lungs (therefore right thinner) and to the rest of the clay. There as some(prenominal) sepa localise pumps, so the smear can increase its hold after visiting the capillaries in the lungs, ready to be maintain at high pressure around the rest of the body. Aorta - transports oxygenated crinkle 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 stain - brings oxygenated blood from the lungs to the left atrium. Heart muscle uses the blood from the coronary artery, leg off the aorta. If coronary artery gets blocked accordingly move of the heart can die - heart attack. atrial Systole Diastole cardiac Cycle Blood returns from the pulmonary vei n/ 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 soundless 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 - condensation 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 come up of blood pumped out of angiotensin-converting enzyme ventricle in integrity minute. Cardiac Output = heart rate x snap volume cm3 perminute bpm cm3 when exercising stroke volume increases, due to heart working harder, resting heart rate decreases. heart rate = 60 seconds / time of one cycle Heart disease Coronary Heart Disease - effects the coronary arteries,...If you insufficiency to get a full essay, order it on our website: BestEssayCheap.com

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