The Heart

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Heart

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15 Terms

1

Heart

A muscular organ with a left and right side, divided by the septum, responsible for pumping blood throughout the body.

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2

Septum

The wall that divides the left and right sides of the heart.

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3

Atrium

The two upper chambers of the heart that receive blood from the circulatory system.

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4

Ventricle

The lower chambers of the heart that pump blood out of the heart.

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5

Valves

Structures in the heart that prevent blood from flowing backwards, similar to veins.

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6

Deoxygenated Blood

Blood that has low oxygen content, entering the right atrium from the body through the vena cava.

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7

Vena Cava

A type of vein that carries deoxygenated blood from the body to the right atrium.

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8

Pulmonary Artery

The vessel that carries deoxygenated blood from the right ventricle to the lungs for oxygenation.

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9

Oxygenated Blood

Blood that has high oxygen content, entering the left atrium from the lungs through the pulmonary vein.

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10

Pulmonary Vein

The vessel that carries oxygenated blood from the lungs to the left atrium.

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11

Aorta

The main artery that carries oxygenated blood from the left ventricle to the rest of the body.

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12

Pacemaker

Specialized cells in the wall of the right atrium that regulate the heart's contraction by sending electrical impulses.

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13

Natural Resting Heart Rate

The normal rate at which the heart beats, controlled by the pacemaker cells.

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14

Faulty Pacemakers

Malfunctioning pacemaker cells that can lead to an irregular heartbeat.

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15

Artificial Pacemaker

A device implanted under the skin that sends electrical currents to the heart to regulate its beating.

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