Respiratory System

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Across
  1. 1. ion responsible for carbon dioxide transport
  2. 5. fatty molecule that lowers the surface tension of water film on the alveolar sac
  3. 6. the immunity a baby receives from its mother through nursing is an example of this type of immunity
Down
  1. 2. better known as “the guardian of the airways”
  2. 3. name of artery just below wrist; often used to count a patient’s pulse
  3. 4. these immune system cells recruit other cells to fight the invaders; act as manager or directors of immune system