The chemical inside them called Haemoglobin helps them do this. When the blood passes through a capillary next to an alveolus in the lungs oxygen diffuses into the red blood cells, where it combines with the haemoglobin to form a bright red substance called oxyhemoglobin.
how do animals obtain oxygen? animal cells exchange oxygen and carbon dioxide with their surroundings by diffusion across the puter coverings or membranes of cells.
Acids have a ph of 6 and below whole bases have a ph of 8 and above. If a human has to much acid in their stomach they can take a pill that will lower it back to its normal ph level
