body systems <3

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Across
  1. 3. can be controlled by will consciously.
  2. 6. Prevent things from entering inside our bodies
  3. 7. are oil glands.
  4. 9. the study of the structure of body parts
Down
  1. 1. deepest layer under skin
  2. 2. the skin cells that make pigment
  3. 4. ability to respond to a stimulus
  4. 5. prevents UV sun damage
  5. 6. the study of the function of the body’s structural machinery
  6. 8. control the contractions of the heart.