You take in oxygen and you exhale carbon dioxide.
You inhale oxygen and exhale carbon dioxide.
G1 - first growth stageenzymes, organelles and protein are madethe organelles growthe cell growsS - synthesisDNA replicates by semi conservative replicationthe chromosome number doubles from 46 to...
Oxygen enters the lungs to be picked up by the erythrocytes; carbon dioxide exits the mouth as a waste product.
Cells break down simple food molecules such as sugar and release the energy it contains.