Thermoreguation is about keeping the body at the right temeperature. For example when you are in cold weather your body notices that it needs to warm up to make sure you are at the right temperature. The hairs on your skin rise when you are cold to trap the heat within the body to keep your muscles and organs warm. Also when you are hot the body realises that you need to cool down so you give off sweat which within a few mintues will cool you down to the right temperature.
Transport of blood around the body
The blood leaves the heart from the left ventricle and then entres the aorta, the blood that leaves the aorta is full of oxygen. The blood then travels throughout the body in its system of arteries into the smallest arterioles. On the way back the blood travels through the veins, the carbon dioxide and waist products leaves the body by getting difused into the alveoli which is then exhaled, leaving the blood before it reaches the lungs. The waist products in the blood are replaced with new oxygen that is inhaled through the lungs, this returns back to the heart as deoxygenated blood.