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14 Cards in this Set

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cells
Your body is made up of tiny building blocks called cells. Cells are specialized, which means that they do a specific job.
tissues
Cells of the same kind form structures called tissues.
organs
Tissues are the materials that form organs, such as the heart, brain and lungs.
systems
Organs work together to form systems.
arteriers
Blood travels away from the heart in passages called arteries.
veins
The blood moves toward the right side of the heart in passages called veins.
respiratory system
The system in your body that allows you to breathe is called the respiratory system. It allows your body to take in and get rid of the materials that your cardiovascular system circulates.
trachea
The air travels through your chest in a tube called the trachea
digestive system
Your digestive system is the system that allows your body to make use of the food you eat
esophagus
a tube that squeezes tiny balls of food down to your stomach
small intestine
The small intestine breaks down the food mixture so your body can absorb the nutrients it needs
nervous system
The nervous system controls the functions of your body. It is made of the brain, the spinal cord, and a huge system of nerves.
reflex
an action that you do without thinking about it is a reflex. A reflex is an act that protects you, such as blinking your eyes if something comes toward them.
neurons
which are long nerve cells, receive information from the environment—for example, that the surface of a stove is hot