Weegy: The somatic nervous system (SoNS or voluntary nervous system) is the part of the peripheral nervous system associated with skeletal muscle voluntary control of body movements. User: Parasympathetic nervous system Weegy: Parasympathetic nervous system is the part of the involuntary nervous system that serves to slow the heart rate, increase intestinal and glandular activity, and relax the sphincter muscles. User: Brain Weegy: The brain is an organ that serves as the center of the nervous system in all vertebrate and most invertebrate animals. (More)

Weegy: The sympathetic nervous system is the part of the autonomic nervous system that contains chiefly adrenergic fibers and tends to depress secretion, decrease the tone and contractility of smooth muscle, and increase heart rate. (More)

Weegy: Hormones are regulatory substance produced in an organism and transported in tissue fluids such as blood or sap to stimulate specific cells or tissues into action. (More)

Weegy: The nervous system is a complex collection of nerves and specialized cells known as neurons that transmit signals between different parts of the body. (More)