The breathing system is needed in mammals to take air into and out of the lungs, allowing for the exchange of oxygen and carbon dioxide between the body and the environment.
El sistema respiratorio en los mamíferos es necesario para llevar aire dentro y fuera de los pulmones, facilitando el intercambio de oxígeno y dióxido de carbono entre el cuerpo y el medio ambiente.
| Front | Why is the breathing system needed in mammals? |
|---|---|
| Back | The breathing system is needed to take air into and out of the lungs, so that oxygen and carbon dioxide can be exchanged between the body and the environment. |
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