FIRST, we inhale oxygen using our nose or mouth., THEN, the air goes down the trachea to the lungs., NEXT, in the lungs, blood absorbs the oxygen., FINALLY, we exhale Carbon Dioxide., IMPORTANT!, The diaphragm helps us inhale and exhale.

Papan mata

Gaya visual

Pilihan

Tukar templat

Pulihkan autosimpan: ?