Answer
The reason something or someone exists
Answer:
The cardiovascular system delivers oxygen, nutrients, hormones, and other important substances to cells and organs in the body. It plays an important role in helping the body meet the demands of activity, exercise, and stress. It also helps maintain body temperature, among other things.
<span>Hi
HIV weakens the immune system. At a late stage, so it makes the body vulnerable to infections. It is transmitted sexually or through blood, or the pregnant woman to her child.
HIV is different from other viruses because it attacks the immune system, which normally role combat<span>.</span></span>
Answer:
Social physiologist
Explanation:
because they study the behavior of groups, including how people behave in social settings
