Heart Slideshow

The Heart

AS a Pump

• The heart beats at about 70kpm. It never tires as it rests after every beat.
• Cardiac muscle does not need nerves to contract.
• When the heart contracts (Systole) it pumps and when it releases (diastole) it fills.
• During exercise your heart beets faster and deeper.
• Valves ensure one-way flow.
• Semi-lunar valves

As a Pump

• The heart beats at about 70kpm. It never tires as it rests after every beat.
• Cardiac muscle does not need nerves to contract.
• When the heart contracts (Systole) it pumps and when it releases (diastole) it fills.
• During exercise your heart beets faster and deeper.
• Valves ensure one-way flow.
• Semi-Lunar valves->
• Atrio-ventricular valves
• Stop backflow from ventricles during systole.
• Valves are NOT muscular, they are opened and closed by differences in blood pressure.
• Valve tendons prevent valves from inverting.
• Bicuspid has 2 flaps and the tricuspid has 3.
• 
• Caption: Semi-Lunar Valves

Heart Diagram LEARN

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