The Respiratory System

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Across
  1. 2. ____ are tough fibrous cords of connective tissue that connect muscles to to the skeleton.
  2. 5. A system of muscles that allows breathing.
  3. 6. After air passes through the nasal cavity, it goes through the ____, which further filters the air and aids against infection.
  4. 8. When air enters through the nose, it passes through the ____, which filters, moistens, and warms the air.
  5. 9. ____ are small sacs at the end of each bronchiole and where oxygen enters into the bloodstream via the capillaries.
Down
  1. 1. ____ provide structural support for the body and protect vital organs.
  2. 2. Nasal cavity -> pharynx -> epiglottis -> ____ -> left and right bronchi -> lungs -> bronchioles -> alveolus -> capillaries
  3. 3. ____ are another type of connective tissue that that connect bones to other bones.
  4. 4. ____is found at the end off all bones, joints, in the nose, and in the ears.
  5. 7. ____ closes when swallowing to prevent food from going down the airway.