Iron
the water
Oxygen and important minerals
Earthworms have a closed circulatory system. Blood is pumped throughout its body by ringed blood vessels. An open circulatory system is not contained in vessels. In a closed circulatory system oxygen is carried in blood! hope this helps=)
The endocrine system's messages are in the form of chemicals called hormones. They are carried through the body by the circulatory system.
Arteries are some of the vessels that the blood travels through. They are part of the circulatory system, but they don't travel. Some of the things carried around the body in the circulatory system are red blood cells, white blood cells, platelets, and immunoglobulins.
target organs
the digestive system and the respiratory system, or the lymphatic system and the endocrine system, or the digestive system and the cardiovascular system, or the endocrine system and the cardiovascular system
HIV infects the circulatory system (is carried in the blood and other bodily fluids). It weakens the immune system when the person develops full blown AIDS (as a result of contracting the HIV virus).
Nutrients do not move along the circulatory system only but they are carried to each cell via extra cellular and extra vascular fluid.( Called interstitial fluid. )
The circulatory system regulates the blood so it can travel to different parts of the body. The muscular system functions when blood is successfully carried into the veins in order to perform an action.
The chemicals secreted by the endocrine system are known as hormones. These chemical messengers are carried by the circulatory system to their target tissues.