How do oxygen and carbon dioxide levels take over time

In the capillaries, oxygen flows rapidly through the blood through this air-blood barrier. Similarly, carbon dioxide flows into the alveoli from the blood and is then exhaled.

Oxygen flows quickly through the blood through an air-blood barrier. Likewise, carbon dioxide flows into the alveoli from the blood and is then exhaled.

Explanation:

small, big, or no change could occur in the phenotype. it could cause something as simple as a cats ears to curl backwards or something as frighting as death. it could also occur in the protien-coding area and have an effect on that but no effect on the amino acids. what has to occur is a changing in the hox gene or the control gene.