These parts are linked in the CNS, but not in the PNS, where they usually occur in different parts of the body. The CNS and PNS both include voluntary and involuntary parts. The involuntary system is broken down into three parts It’s always active and regulates a person’s heart rate, breathing, metabolism, among other critical body processes. The body’s involuntary (vegetative or automatic) nervous system controls processes in the body that a person doesn’t consciously control. The body’s voluntary (somatic) nervous system controls things a person is aware of and can control consciously, such as moving their head, arms, legs, or other body parts. But it also has voluntary and involuntary nervous systems. There are two types of nervous systemsĮveryone’s body has a CNS and a PNS. All remaining nerves in other parts of the body are part of the PNS. It includes the nerves in the brain and spinal cord. The CNS is located in the skull and vertebral canal of the spine.
They are distinguished by their location in the body and include the central nervous system (CNS) and the peripheral nervous system (PNS). The human nervous system is divided into two parts. There are two parts of the nervous system Interneurons: Interneurons sends messages from one neuron to another.ĥ.Receptors: Receptor neurons sense the environment (light, sound, touch, and chemicals) around you and convert it into electrochemical energy that is sent by sensory neurons.
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Sensory: Sensory neurons deliver electrical signals from the outer parts of the body - the glands, muscles, and skin - into the CNS.