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7th Grade Topic 3 Lessons 1-3 Vocabulary Quiz

Across
An action or change in behavior that occurs as a result of a stimulus.
Waves of smooth muscle contractions that move food through the esophagus toward the stomach.
Organs that produce and release chemicals either through tiny tubes called ducts or directly into the bloodstream.
Fluid released from glands i the mouth and plays an important role in both mechanical and chemical digestion.
An energy-rich organic compound that is made of the elements carbon, hydrogen and oxygen.
The substances in food that provide the raw materials the body's cells need to carry out all their essential processes.
Any change or signal in the environment that can make an organism react in some way.
The chemical produced by an endocrine gland.
Down
The reaction of a person's body to potentially threatening, challenging or disturbing events.
A group of organs that work together, performing major functions.
A body structure composed of different kinds of tissues that work together.
The process by which your body breaks down food into small nutrient molecules.
Proteins that speed up chemical reactions in the body.
The grouped together of similar cells that perform the same function.