دانلود کتاب اطلس جیبی آناتومی انسان

The peripheral nervous system (PNS) comprises all the neural structures outside the brain and spinal cord, which constitute the central nervous system (CNS). The PNS has two main components: the somatic nervous system and the autonomic nervous system; the latter deals with involuntary control of smooth muscle and glands. As this book is concerned with skeletal muscles, it is only the somatic nervous system that is of interest.