Answer:
wasn't it like the whale or elephant?
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:
I think b is the answer . I'm not sure I only tried..
For people suffering from high blood sugar, the insulin
helps decreases the amount of sugar in the system. The negative feedback in the
system regulates the amount of sugar in the system in order to maintain the homeostasis
in the body.
You need to give more context of the question I don’t understand what the question is about
