Organ Systems Crossword Puzzle

Organ Systems

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Across

Down

Smallest blood vessel where substances are exchanged between blood and body cells

Involuntary waves of muscle contractions (occurs in stomach and esophagus)

Red blood cells are made mostly of this, iron-containing protein

This systems breaks down food into molecules you can use

This system moves oxygen from the outside environment into the body

This system collects waste produced by cells and removes the waste from the body

Blood vessels that carry blood back to the heart

Liquid part of blood, made up of 90 percent water

Largest artery in the body

Lower chambers of the heart that pumps blood out of the heart

This system delivers nutrients and oxygen to the cells, removes waste and carbon dioxide from the cells

Carries blood away from the heart

Flap of tissue that prevents blood from flowing backward

This system produces chemicals that control many of the body's daily activities, also regulates long term changes such as growth and development

This system receives information about what is happening inside and outside of your body, it controls the way in which your body responds to this information

Two upper chambers of the heart

Cell fragments that play an important part in forming blood clots

Answer