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Unit 4 Human Body Systems: Lessons 4-5

Across
Contains many substances, including an enzyme that begins the chemical digestion of starches in food.
The body senses the environment with specialized structures that include the eyes, the skin, the ears, the mouth, and the nose.
A muscle bag that crushes food and contains acids and enzymes for killing bacteria and breaking down proteins.
Contain blood and lymph vessels that absorb nutrients from food as it passes through the small intestine.
This system breaks down the food you eat into nutrients that can be used as building materials and that can provide energy for cells.
Controls body functions and helps maintain homeostasis by using hormones.
Makes fluids that break down every type of material found in foods: proteins, carbohydrates, fats, and nucleic acids.
Allows your brain to communicate with the rest of your body.
A cell that moves messages in the form of fast-moving electrical energy.
Down
Protect and support neurons, but do not transmit nerve impulses.
Chemical messengers that signal the kidneys to filter more or less water or salt, depending on the levels of water and salt in the body.
Made of the structures that control the actions and reactions of the body in response to stimuli from the environment.
Eliminates cellular wastes from the body through the lungs, skin, kidneys, and digestive system.
Makes and releases a mixture called bile that is then stored in the gall bladder.
Waves of muscle contractions that move the food into the stomach.
One of a pair of organs that remove waste from the blood.
The body's central command organ.
A chemical that the body uses to break down large molecules into smaller molecules so they can pass into the blood stream.