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The heart is a four chambered organ, supplied by coronary circulation, that pumps oxygen-poor blood into the lungs and oxygen-rich blood to the rest of the body

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The heart is a four chambered organ, supplied by coronary circulation, that pumps oxygen-poor blood into the lungs and oxygen-rich blood to the rest of the body

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Table 2:
The heart works continuously and lies near the anterior chest wall. It is made of three distinct layers: epicardium, myocardium, and endocardium. Blood cycles through 4 different chambers and 4 different valves which starts and ends in the hard.

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The heart works continuously so that cardiac muscle cells require reliable supplies of oxygen and nutrients. It contains various muscles and tissues that helps the heart expand and spread blood throughout itself and the body.

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A cardiac cycle is the period between the start of one heartbeat and the start of the next. This cycle can be divided into two phases: Systole, blood is squeezed into the an adjacent chamber; Diastole is relaxation.

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Heart beat is controlled by contractile cells and are regulated by the two types: nodal cells and conducting cells

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The force of myocardial contractions is altered thrugh the release of NE,E,ACh. Various drugs affect contractility of the heart.

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The septum “divides” the heart in half, then is also divided by inferior and superior.

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The “lub” and “dub” sounds is a result of the valves opening and closing. - Andrew

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The heart is made up of 3 layers

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Valves act as bouncers; they prevent the back flow or regurgitation of blood.

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The heart is 250-350 grams and is hollow.

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Ravin
Your heart is divided latterly

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Blood has different pressures in different parts of the body.

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Arteries carry blood away from the heart, veins bring blood back to the heart.

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The heart is roughly the size of 2 fists together.

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arteries carry blood away from the heart while veins carry it towards the heart

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The ventricles are big strong muscles that pump blood out to the body.

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Each chamber has a corresponding valve

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The heart beats about 100,000 times a year

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Normal systemic pressure is 120

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Blood pressure is the amount of strain on your arteries.

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Blood pressure is systolic pressure over diastolic pressure