Concept:Organization of the Human Nervous System.Explanation:The human nervous system is broadly divided into two main parts:1. Central Nervous System (CNS): This includes the brain and the spinal cord. It acts as the control center.2. Peripheral Nervous System (PNS): This includes all the nerves that branch out from the CNS to the rest of the body. Its main function is to connect the CNS to the limbs and organs.The nerves that make up the PNS are of two types: a. Cranial Nerves: These nerves originate directly from the brain. b. Spinal Nerves: These nerves originate from the spinal cord.Therefore, the peripheral nervous system consists of both cranial nerves and spinal nerves.Answer:Cranial nerves and spinal nerves.