doodlejuice12 doodlejuice12

30-04-2020
Chemistry

contestada

When you breath in, oxygen passes through the walls of the ______________(tiny sac-like structures) and into the blood.
veins

arteries

trachea

alveoli

Respuesta :

peaceheartsmiley22 peaceheartsmiley22

30-04-2020

Answer:

alveoli

Explanation:

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