No i dont think so precautions are needed sometimes
Answer:
probably your hands nose and mouth not too sure
Explanation:
The cardiovascular system transports oxygen to cells through blood and takes away carbon dioxide from the cells.
Hope this helps... mark as Brainliest plz
<span> Physical fitness is a goal; exercise is a means to reach that goal.
Physical fitness is a quality and strength of the state of muscles, heart, and ligaments. Exercise is an action that increases the quality and strength of the state of muscles, heart, and ligaments.</span>