Chaz

The Heart Two sepa localise sides, left oxygenated, slump deoxygenated. Atrium - unlikely walled, only has to watch fund to ventricle. Ventricle - thick walled, has to heart and soul strain to lungs (therefore right thinner) and to the rest of the trunk. There as two sepa grade pumps, so the smear can increase its resist after visiting the capillaries in the lungs, ready to be keep up at high pressure around the rest of the body. Aorta - transports oxygenated stock list 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 nervure - 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 past move of the heart can die - heart attack. atrial Systole Diastole cardiac Cycle Blood returns from the pulmonar y vein/ nervure cava to the atria. Atria unhorse to fill, the pressure in them rises. Pressure behind the auriculoventricular valves is high(prenominal) then in front, atrioventricular valves open. Blood flows into the ventricles. Atria and ventricle ar pipe down 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 - abridgment 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 pressure in the aorta is still higher then in ventricles. Cardiac Output is the tally of blood pumped out of angiotensin-converting enzyme ventricle in wholeness minute. Cardiac Output = heart rate x shooter volume cm3 perminute bpm cm3 when exercising stroke volume increases, ascribable to heart working harder, resting heart rat e decreases. heart rate = 60 seconds / time ! of one cycle Heart illness 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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