The circulatory system is system in the human body that provides a network through which our blood flows constantly.The human cardiovascular system is considered closed because there are no holes for blood to enter or leave the system. Correct answer: D
In the closed circulatory system the blood stays confined within the vessels and heart.
The role and function of narcotics are for depressant and is typically used for severe pain. What these medications do is that they shut down the central nervous system which sends and perceives this sense of severe pain. Examples of narcotics include codeine and MORPHINE.
Find someone that can help with the issue. it depends on what the addiction is.
<span>Hope this helps.
The skeletal system makes up the framework of the body and allows us to move when our muscles contract.</span>
