Answer:
the statement that best describes the role of artificial heart is : The artificial heart has limited usefulness but can prolong life or be a tool to use while waiting for a transplant.
Explanation:
Although there are less chances of rejection while using the artificial heart but there is always a risk that artificial heart will not work properly and have to be ultimately replaced.
Studies have shown that artificial heart surgeries can lead to serious complications.
Also, artificial hearts do not work as healthy as natural ones.
Answer:
Less air sacs or surface area = less gas exchage = less oxygen makes it to the blood
Explanation:
Well, smoking is very bad cuz it basically breaks down your alveoli (air sacs) and causes their wall to be so thin that they start to merge with each other. Merging lowers the available surface area in lung for gas exchange, thus you cannot exchage the oxygen from your lung into the blood. Even though when you breathe in you take in all the oxygen you possibly can, it does not matter cuz it won't be making it to your blood as efficiently.
Nutrients and oxygen is the answer because the circulatory system does that work and the other one is from another system
