I believe what you're looking for is alveoli.
Answer:
im not sure i understand your question?
Explanation:
Prescription drugs are often strong medications, which is why they require a prescription from a doctor or dentist.
There are three kinds of prescription drugs that are commonly misused:
Opioids—used to relieve pain.
Depressants—used to relieve anxiety or help a person sleep.
Stimulants— used for treating attention deficit hyperactivity disorder (ADHD).
Explanation:
I hope it'll help you...
To pump more blood and oxygen into the body thats why it increases because it needs to work more
Round, and lean are the answers
