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Blood and Cardiovascular System Crossword Puzzle

Across
Fluid portion of the blood
upper chamber of the heart
Undecisive cells
White blood cells
Heart and blood vessels
Heart chamber wall contracts
Cavity
Down
Heart chamber wall relaxes
Blood clotting
Helps blood clots
Red blood cells
Body is in normal range
Membrane around the heart
Separates atrium and ventricle
Oxygen that carries pigment to red blood cells
Chemical trigger on immune response