You have to do your own goal
<span>It is true that tobacco can damage the immune system of a person with AIDS. Although this is the case with most people - tobacco negatively affects anyone's immune system, not only those who have AIDS - people who do have AIDS are more likely to be seriously harmed than those who do not. People with AIDS already have a weakened immune system that is unable to fight off any diseases, so if it is damaged even more, they can easily die.</span>
The second statement best explains the type of blood vessel and the function of these vessels' valves - <span>These are veins, which prevent the backflow of blood because the walls have little muscle to pump blood back to the heart.
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Veins are large blood vessels which carry blood back to the heart. <span>Veins have a system of valves to prevent back-flow.</span>
Answer:
B. buildup of lactic acid
A. is removed through the bloodstream
Explanation:
These are the correct answers to the questions above
