The Nervous System is comprised of which structures?

The Nervous System is comprised of which structures?

• A. Stomach, intestines, mouth and glands
• B. Kidney, liver, skin, large intestines and lungs
• C. Brain, spinal cord and nerves
• D. Blood, blood vessels and the heart

Answer: (C)

The nervous system is the body's command center and network for signaling. Its main structures are the brain, which acts as the control center; the spinal cord, the main conduit linking brain and body; and the nerves, the network that carries signals to and from every part of the body. Together, these components form the central nervous system (brain and spinal cord) plus the peripheral nervous system (the extensive web of nerves). The other options point to organs and tissues from different body systems—digestive organs like the stomach and intestines (and glands); organs from the urinary, integumentary, and respiratory systems; and components of the circulatory system like blood, vessels, and the heart. None of those are the structures that make up the nervous system, so the correct set is brain, spinal cord, and nerves.

The nervous system is the body's command center and network for signaling. Its main structures are the brain, which acts as the control center; the spinal cord, the main conduit linking brain and body; and the nerves, the network that carries signals to and from every part of the body. Together, these components form the central nervous system (brain and spinal cord) plus the peripheral nervous system (the extensive web of nerves).

The other options point to organs and tissues from different body systems—digestive organs like the stomach and intestines (and glands); organs from the urinary, integumentary, and respiratory systems; and components of the circulatory system like blood, vessels, and the heart. None of those are the structures that make up the nervous system, so the correct set is brain, spinal cord, and nerves.