The Human HeartThe Human Heart

By: Weike GaoBy: Weike GaoBlock: DBlock: D

Blood FlowBlood Flow

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Superior Vena Cava

The superior vena cava is a vien that carries de-oxygenated blood from the upper half of the body to the heart's right atrium.

Inferior vena cava The inferior

vena cava carries de-oxygenated blood from the lower part of the body to the heart

Right atrium The right

atrium receives de-oxygenated blood from the body and pumps it into the right ventricle

Right ventricle

The right ventricle receives the de-oxygenated blood from the right atrium and pump it into the pulmonary artery

Pulmonary arteryPulmonary arteryCarries Carries de-de-oxygenateoxygenated blood d blood from the from the heart to heart to the lungthe lung

Pulmonary veinPulmonary vein

The The pulmonary pulmonary vein vein carries carries oxygenateoxygenated blood d blood from the from the lungs to lungs to the heart.the heart.

Left atriumThe left atrium receives oxygenated blood from the pulmonary veins to the left ventricle.

Left ventricle The left

ventricle receives oxygenated blood from the left atrium and pumps it into the aorta.

aortaaortaThe aorta The aorta brings brings oxygenated oxygenated blood to all blood to all parts of the parts of the human human bodybody

Tricuspid valve

• The tricuspid valve is between the right atrium and right ventricle

Aortic valve• The aortic

valve is between the left ventricle and the aortic in a human heart.

Mitral valve

• This valve lies between the left atrium and the left ventricla.

Septum • The

septum of the heart is a wall that separates the right and left sides of the heart.

heart muscleheart muscle The cardiac The cardiac

muscle( a.k.a. the heart muscle( a.k.a. the heart muscle) is a cross muscle) is a cross between skeleton muscle between skeleton muscle and smooth muscle. It’s and smooth muscle. It’s function is to pump blood.function is to pump blood.

A single heart muscle cell working

MRIMRI MRI stands for MRI stands for

Magnetic Magnetic Resonance Resonance Imaging, which Imaging, which is a non-is a non-invasive way to invasive way to examine images examine images of thing inside of thing inside an object.an object.

CTCT Computer Computer

tomography (a.k.a. tomography (a.k.a. CAT scan) uses x-CAT scan) uses x-ray to take images ray to take images of the internals of of the internals of an objectan object

Nuclear Medicine ScanNuclear Medicine ScanNuclear Nuclear medicine medicine scans are scans are images that images that areare taken taken using nuclear using nuclear properties.properties.

SonographySonography Ultrasound Ultrasound

scans uses scans uses high frequency high frequency sound waves sound waves to produce to produce images of images of internal internal organs.organs.

Map of the Human Heart

   Oxygen-poor blood (shown in blue) flows from the body into the right atrium

   Blood flows through the right atrium into the right ventricle.

   The right ventricle pumps the blood to the lungs, where the blood releases waste gases and picks up oxygen.    The newly oxygen-

rich blood (shown in red) returns to the heart and enters the left atrium.

   Blood flows through the left atrium into the left ventricle.

  The left ventricle pumps the oxygen-rich blood to all parts of the body.

Form:http://www.pbs.org/wgbh/nova/heart/heartmap.html

Interesting FactsInteresting Facts Put your hand on your heart. Did you place your hand on the left

side of your chest? Many people do, but the heart is actually located almost in the center of the chest, between the lungs. It's tipped slightly so that a part of it sticks out and taps against the left side of the chest, which is what makes it seem as though it is located there.

Hold out your hand and make a fist. If you're a kid, your heart is about the same size as your fist, and if you're an adult, it's about the same size as two fists.

Give a tennis ball a good, hard squeeze. You're using about the same amount of force your heart uses to pump blood out to the body. Even at rest, the muscles of the heart work hard--twice as hard as the leg muscles of a person sprinting.

More…More… Your heart beats about 100,000 times in one day and about 35 million

times in a year. During an average lifetime, the human heart will beat more than 2.5 billion times.

The aorta, the largest artery in the body, is almost the diameter of a garden hose. Capillaries, on the other hand, are so small that it takes ten of them to equal the thickness of a human hair.

Your body has about 5.6 liters (6 quarts) of blood. This 5.6 liters of blood circulates through the body three times every minute. In one day, the blood travels a total of 19,000 km (12,000 miles)--that's four times the distance across the US from coast to coast.

The heart pumps about 1 million barrels of blood during an average lifetime--that's enough to fill more than 3 super tankers.

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