The body's nervous system is made up of the brain, the spinal cord, the retina, and many other nerves. The circulatory system is made up of the heart, arteries, veins, and capillaries. The nervous system tells the heart when to beat, and the circulatory system supplies nerve cells with blood. Which of the following best describes the relationship between the nervous system and the circulatory system? A. The nervous system and the circulatory system do not affect each other. B. The nervous system is a subsystem of the circulatory system. C. The circulatory system is a subsystem of the nervous system. D. The circulatory system and the nervous system depend on each other.

Circulatory system is a system that comprises of the heart, blood, and blood vessels, arteries and veins including capillaries. It circulate nutrients and gases through the blood round the body.

The nervous system consist of nerves and fibres that transmit signals from the body to the brain and vice versa.

The circulatory system and nervous system depend on each other to function.

The nervous system interact with the nervous system by given instructions and direction to tissues and organs of the circulatory system on the transmission of blood and the circulatory system transmit oxygen to all cells in.the body including nerve cells.