Answer:
A. MHR= 100 - your age
Explanation:
If you do 100 - your age you'll get your answer
The answer is Alveoli. C<span>arbon dioxide move from the circulatory system to the respiratory system in the Alveoli. </span>Alveoli are tiny sacs within our lungs that allow oxygen and carbon dioxide to move between the lungs and bloodstream. <span>The function of the alveoli is </span>to get oxygen into the blood stream<span> for transport to the tissues, and </span>to remove carbon dioxide<span> from the blood stream.</span>
When incresing or building up your mucle there will awalsy be a defualt and that places your building up is going to be painful of the space that got worked so there is a hart attack