Only in part--the brainstem is also involved and feedback mechanisms, like sweating. But yes, the blood vessels dilate to help cool the blood which then circulates and helps cool the core body temp.
Your question is not quite clear, but if you are asking "does the circulatory system help maintain body temperature?" then I would the answer is yes. It moves blood throughout the body which regulates the body temperature. Doing so also supplies supplies oxygen and nutrients for the cells in your body.
helps protect the body against bacteria
No. The skin is its own organ, though one of its functions is to help regulate body temperature by providing a way for the circulatory system to transfer excess heat away from the body. (It also cools the body by producing sweat, which in turn reduces the body's temperature as it evaporates.)
The circulatory system is very important to our body. The circulatory system is the system responsible for the process of inhaling oxygen and removing carbon dioxide, delivers the nutrition our body needs to sustain, releases waste materials out from our body, gives immunity to sickness and regulates our body temperature.
The circulatory system may not be able to maintain the normal body temperature and accordingly one feels warmer and hotter and temperature gets more than normal of 37 degrees centigrade.
The circulatory system transport oxygen and respiratory material (food) to the billions of our body cells.
closed circulatory system.
The circulatory system
closed circulatory system (double circulatory system)
the Hypothalamus and Homeostasis
circulatory system
The circulatory system is the transportation system of your body.