Because each body system has a completely different function.
Answer:
false the medication needs to be taken untill it is no longer in their system
True, abstinence is the practice of giving up something, it necessarily doesn't have to be all about sex, which is many average thinkers are taught in schools. It can be alcohol or even toys and games!
Answer:
The blood picks up co2 and also waste from the tissue. So I am guessing that it is co2.
Hope this helps.