The cardiovascular system or the circulatory system is made up of three major components; which of the following is not a component of the cardiovascular system?

The heart, blood vessels and blood are all major components of the cardiovascular system.  Myoglobin is a component of muscle. When large muscle masses are injured they give off myoglobin into the blood stream.  Myoglobin molecules are large and cause problems with the renal system during times of trauma, elocution or burns.