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The heart has 4 chambers (Rv Ra, Lv, La).

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Contractile cells and the conducting system produce each heartbeat, and an electrodiagram  records the associated electrical waves.

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Frank Starling’s principle is more in = more out.

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The Cardiac cycle is the period between the start of one heart beat and the start of the next single cardiac cycle.

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There are two types of cardiac cycles: systole which is when the heart contracts and diastole which is when the heart relaxes.

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The three distinct layers of the heart are epicardium, myocardium, and endocardium.

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Cardiodynamics refers to movements and forces generated during cardiac contractions, each time the heart beats the two ventricles eject equal amounts of blood.

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The hearts main concern is maintaining pressure
Ryan and Jaden

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Valves and arteries all work together to circulate blood throughout the body.

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The heart is made of three layers: the epicardium, myocardium, and endocardium.

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The septum is the division between the two sides of the heart.

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Myocardium is made of muscle tissue which does most of the contracting

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The heart weighs 250-350 grams.

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The average human heart beats around 100,000 times per day.

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The inferior ventricle is responsible for high pressure.

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Your heart beats 2 billion times in a lifetime

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There’s 35 million heart beats per year

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arteries carry blood away from the heart and veins carry blood to the heart