Human Heart

Heart

Human Heart

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It is about the size of your fist

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Weighs 9-12 ounces/250-350 grams

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Beats about 100,000 times a day

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Pumps 2000 gallons of blood a day or 7600 Liters

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Beats more than 2.5 billion times in a lifetime

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Cardiac muscle cells are called cardiomyocytes, and they can live up

to 50 years!

Multiple Choice

Which of the following is a heart muscle cell?

• Lymphocyte

• Cardiomyocyte

• Erythrocyte

• Osteocyte

Multiple Choice

How many times does a human heart beat in a lifetime

• about 3 trillion times

• about 100,000 times

• about 2.5 billion times

• about 1.5 quadrillion times

The heart performs the following functions:

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The heart pumps oxygenated blood throughout the body

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Receives deoxygenated blood in the body, and delivers it to the lungs for

removal

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Delivers waste from the body’s cells to the liver and kidneys to be filtered

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Circulates hormones and essential nutrients throughout the body

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Maintains blood pressure

Multiple Choice

Which of the following is NOT a function of the heart?

• Circulates hormones and essential nutrients throughout the body

• Delivers waste from the body’s cells and delivers it to the liver and kidneys

• Pumps oxygenated blood throughout the body

• Transmits signals from the brain to the body

The heart is made up of 4 chambers:

Chambers of the Heart

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The right atrium receives oxygen poor blood from the body, and pumps it to

the right ventricle

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The right ventricle pumps oxygen poor blood from the right atrium to the

lungs

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The left atrium receives oxygenated blood from the lungs, and sends it to the

left ventricle

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The left ventricle pumps oxygenated blood to the body

Labelling

Identify the chambers of the heart

Drag labels to their correct position on the image

left atrium

right atrium

left ventricle

right ventricle

Valves of the Heart

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Valves are important because they prevent the backwards flow of blood

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The mitral and tricuspid valves move blood from the upper atrium chambers to the lower ventricle chambers

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The aortic valve move blood from the heart to the body

• ​ The pulmonary valve moves blood from the heart to the lungs

Multiple Select

Which of the following are correct (pick more than one answer)?

• The aortic valve moves blood from the heart to the body

• The tricuspid valve moves blood from the body to the right ventricle

• The heart valves prevent the forward flow of blood

• The mitral valve is also called the bicuspid valve