Because is a good way to help us get our education for free or with a less cost
That would be the Endoplasmic Reticulum my good friend hope this helped... :D
In a process called diffusion, oxygen moves from the alveoli to the blood through the capillaries (tiny blood vessels) lining the alveolar walls. Once in the bloodstream, oxygen gets picked up by the hemoglobin in red blood cells.
Because there will eventual reach a point where the food or some other necessity runs out and instead of growth continuing, it stays at relatively constant.
