Circulatory System

Name: ______________________   Date: ____________

Use the clues to fill in the crossword.

Across

  1. 2. A structure in a hollow organ with a flap to insure one-way flow of fluid through it (plural) (6)
  2. 4. Movement through a ___ (11)
  3. 7. A tube in which a body fluid circulates (6)
  4. 8. Red liquid pumped around the body by the heart (5)
  5. 10. A blood vessel that carries blood from the heart to the body (plural) (8)
  6. 11. Tiniest unit of living things (plural) (5)
  7. 12. A regular route for a sentry or policeman (4)

Down

  1. 1. Any of the minute blood vessels connecting arterioles with venules (9)
  2. 3. A fourth state of matter distinct from solid or liquid or gas and present in stars and fusion (6)
  3. 4. Of or relating to the heart (7)
  4. 5. A blood vessel that carries blood from the capillaries toward the heart (plural) (5)
  5. 6. Any chamber that is connected to other chambers or passageways (6)
  6. 9. Organ that pumps blood around the body (5)