The answer is: 13) B 14) C 15) A
The answer is B because a virus would be more effective
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.
The liver makes sure that blood glucose levels remain steady. But when blood glucose levels fall, the pancreas secretes glucagon. Therefore the answer to your question in the pancreas.
Answer:
Yes
Explanation:
is it not obvious lol, you're a POC if you aren't white
