The carbon dioxide breathed out is a by-product of the process of cell respiration, as is water. In this process, energy is produced in the mitochondria of cells. This energy is our physical "life force". Both oxygen and glucose are required for this.
So you don’t tear any tissue and so they get more elastic.
The cell as a system contains the organelles sites of most cells active. Assembly line where workers do Endoplasmic Reticulum
