Digestive
Nervous
Muscular/Skeletal
Immune
Circulatory
100

This organ connects the mouth to the stomach. 

What is the esophagus?

100

This organ connects the brain with the rest of the nervous system. 

What is the spinal cord?

100

A group of different tissues that has a specific function.

What is an organ?

100

This is the body's defense against disease-causing organisms.

What is the immune system?

100

These blood cells are responsible for transporting oxygen and carbon dioxide.

What are red blood cells?

200

This food group incudes grains and is the primary source of energy for the body.

What are carbohydrates?

200

This is the proper term for a nerve cell. 

What is a neuron?

200

A group of similar cells that perform the same function.

What is a tissue?

200

These proteins destroy certain types of invaders. 

What are antibodies?

200

These pipelines bring blood back to the heart. 

What are veins?

300

This food group includes fats and oils.

What are lipids?

300

These are signals to which an organism responds. 

What are stimuli?

300

This bone is the longest in the body.

What is the femur?

300

This reaction occurs when the body is sensitive to certain substances.

What are allergies (allergic reactions)?

300

These thin-walled blood vessels have permeable walls. 

What are cappillaries?

400

This type of acid is important in the composition of proteins.

What are amino acids?
400

The transparent protective covering of the eye. 

What is the cornea?

400

These are the three types of muscles

What are skeletal, smooth, and cardiac?

400

This state occurs when the body has resistance to a disease-causing organism or harmful substance.

What is immunity?

400

These cell fragments are responsible for blood clotting.

What are platelets?

500

This organ creates bile, an important digestive substance. 

What is the liver?

500

These are the three parts of the brain in order from smallest to largest.

What are the medulla, cerebellum, and cerebrum?

500

This small bone is directly above the sternum.

What is the manubrium?

500

This is considered the body's "second line of defense" against invading organisms. 

What is Inflammatory Response?

500

This large blood vessel takes blood from the heart to the lungs. 

What is the pulmonary artery?

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