Answer:
a.they work together to allow gas exchange
Explanation:
the trachea helps transport air to the lungs, the lungs fill with air, finally the alveoli convert the oxygen to the bloodstream
Answer:
A is the correct answer.
Explanation:
The respiratory system is a group or organs and tissues that help the body breathe. In other words, its main task is to remove wasting gases and replace them with new and fresh air. In other words, these organs and tissues work together to allow gas exchange.
