Circulatory system is the system of our body which includes heart, blood and blood vessels. This system is a complete network which helps in supplying oxygen and other nutrients to the body tissues. It helps in transporting hormones and also removes the unnecessary or waste products.
The heart which is a primary organ of the circulatory system acts like a pump and pumps blood throughout the body with the use of blood vessels. The blood vessels which transport the blood towards the heart is called the vein while the blood vessels which transport the blood away from the heart is called the artery. The arteries carries oxygen and nutrients to the tissues and cells which is then re-oxygenated in lungs and transported back to the heart through vein.
Therefore, the system responsible for transporting nutrients through out the body is the circulatory system.