Sympathetic Nervous System. A branch of the ANS (autonomic nervous system) responsible for mobilizing the bodyâ€(tm)s energy when stressed or aroused.

somatic nervous system. directs the contraction of skeletal muscles.

Sympathetic Nervous System. the part of the nervous system that controls the vital functions of the body that are not consciously regulated. It includes the activity of the heart, the smooth muscles (such as digestive muscles), and glands.

somatic nervous system. The efferent division of the nervous system that innervates skeletal muscles.

stands for “Supplemental Nutrition System” and is sometimes used to allow weak babies to be fed at the breast. It is also used to enable adoptive mothers to nurse their babies.