The basic route of the efferent somatic nervous system includes a two neuron sequence.

传出躯体神经系统的路包括一个二级神经元序列。

The somatic nervous system consists of afferent fibers that receive information from external sources, and efferent fibers that are responsible for muscle contraction.

躯体神经系统由接收外信息的传入纤维和负责肌肉收缩的传出纤维组成。

They're striated like cardiac muscle tissue, but they're also mostly voluntary, meaning you have to think about using them and activate them with your somatic nervous system.

心肌组织一样有条纹，但也大多是自愿的，这意味着你必须考虑使用，并用你的躯体神经系统激活。

The Peripheral Nervous System. The peripheral nervous system includes 12 cranial nerves and 31 pairs of spinal nerves. It can be subdivided into the somatic and autonomic nervous systems.

3。周围神经系统;周围神经系统包括12条脑神经和31对脊神经。可以细分为躯体神经系统和自主神经系统。