The somatic nervous system innervates which structures?

The somatic nervous system innervates which structures?

• A. Innervates the skin and most skeletal muscles
• B. Innervates the organs of the body (viscera) and the smooth muscle
• C. Innervates autonomic ganglia
• D. Innervates the enteric nervous system

Answer: (A)

The somatic nervous system handles voluntary control of the body and carries sensory information from the body surface. It directly innervates the skin for sensation and skeletal muscles for movement via motor neurons that connect from the central nervous system to the muscle without intervening autonomic ganglia. That’s why innervation of the skin and most skeletal muscles is the hallmark of the somatic system. In contrast, the autonomic nervous system manages involuntary functions of the viscera, including smooth muscle and glands, using a two-neuron pathway with autonomic ganglia. The enteric nervous system is a gut-specific network that can operate on its own but is modulated by autonomic input.

The somatic nervous system handles voluntary control of the body and carries sensory information from the body surface. It directly innervates the skin for sensation and skeletal muscles for movement via motor neurons that connect from the central nervous system to the muscle without intervening autonomic ganglia. That’s why innervation of the skin and most skeletal muscles is the hallmark of the somatic system.

In contrast, the autonomic nervous system manages involuntary functions of the viscera, including smooth muscle and glands, using a two-neuron pathway with autonomic ganglia. The enteric nervous system is a gut-specific network that can operate on its own but is modulated by autonomic input.