ilovecats12378 ilovecats12378
  • 13-05-2020
  • Biology
contestada


i need help i cannot find the answer

i need help i cannot find the answer class=

Respuesta :

sandybutt
sandybutt sandybutt
  • 13-05-2020

Answer:

down

Explanation:

contracts and pulls down, which allows the lungs to expand and pull in air

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