I think the circulatory system is the best body system because we need the heart to stay alive, many people live with only one lung. but we need the respiratory system to let oxygen in, and let carbon dioxide out.
Your answer would be false because cells are actually the main building blocks of organs. Have an awesome day!!
Answer:
Our limbs, such as our arms and legs, grow basically at the same time and to the same length. ... Scientists are still unsure of how exactly human arms, legs, ears, or lungs grow in such a symmetrical way.
True because healthy eating comes from a healthy physical activity
