I believe it’s carbon dioxide, because you use your respiratory system to breathe in oxygen, and oxygen goes through your circulatory system. And you breathe out CO2.
Answer:
The best answer to the question: Which zones do you think would be most affected by this disorder, would be, C: Proliferation and hypertrophic zones.
Explanation:
The reason why a human being is able to grow from his/her small body when borh, to his/her adult body size is in part because his/her bones continue developing and growing, meaning enlarging, until they reach their adult, and fully matured size. However, in people with Achondroplasia this is not the case. Essentially, people with this affection will have problems at the zones of the bone where both proliferation of the chondrocytes and hypertrophy of the tissue that has been produced takes place. This will cause for an incomplete enlargement and formation of the fully-grown and development of the bone, and which becomes evident in people with this affectation due to their limbs being more "child-like" than in adults who did not suffer from it.
