Body Systems Reading: HS-LS1-2 and 1-3.

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14 Terms

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Digestive System

The system that breaks down food and absorbs nutrients.

<p>The system that breaks down food and absorbs nutrients.</p>
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Glucose

A type of sugar the body uses for energy.

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Cellular Respiration

The process by which cells create energy from glucose and oxygen.

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Respiratory System

The system that brings oxygen into the body and removes carbon dioxide.

<p>The system that brings oxygen into the body and removes carbon dioxide.</p>
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Alveoli

Tiny air sacs in the lungs where oxygen is exchanged with the blood.

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Diaphragm

A muscle that helps the lungs expand and contract during breathing.

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Circulatory System

The system that moves blood, oxygen, and nutrients throughout the body.

<p>The system that moves blood, oxygen, and nutrients throughout the body.</p>
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Heart

The organ that pumps blood throughout the body.

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Kidneys

Organs that filter waste from the blood.

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Nervous System

The system that controls and coordinates body activities.

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Neurons

Nerve cells that send messages through the body.

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Homeostasis

The process the body uses to keep internal conditions stable, such as levels of glucose, water, salt, temperature and pH, despite changes in the external environment.

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Negative Feedback

A process that slows or stops a stimulus to bring things back to normal.

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Positive Feedback

A process that strengthens or increases a stimulus.