As you go farther up into Earth's atmosphere, there is less are and less pressure!
A person should at least get 60 minutes of physical activity a day.
The other person could be peer pressuring you and an internal factor could be a chemical in your brain
Answer:
The circulatory and respiratory systems work together to circulate blood and oxygen throughout the body. Air moves in and out of the lungs through the trachea, bronchi, and bronchioles. Blood moves in and out of the lungs through the pulmonary arteries and veins that connect to the heart.
Explanation:
Hope this helps!
Good Luck!
I was looking thru my old bio notes and I believe it’s caused by emphysema since it says that it’s caused by an irritant (like smoke)
