PPT-The Nervous System Cell Structure

THE CENTRAL NERVOUS SYSTEM The nervous system is divided into two subunits Central nervous system CNS Brain spinal cord Peripheral nervous system Any part of nervous system outside of CNS. Central. Nervous. System. (CNS). Peripheral. Nervous. System. (PNS). 2. ". You have brains in your head.. You have feet in your shoes.. You can steer . yourself. Any direction you choose.”. . Watch video:. Mr. E Murphy. Strange fact. A newborn baby's brain grows almost 3 times during the course of its first year. . Objectives. Identify the importance of the nervous system in humans. Know the difference between the CNS and the PNS. The . function of the nervous system is:. To sense, interpret, and respond to internal and external environmental changes to maintain a steady state in the . body (homeostasis). The nervous system is divided into two major structures: . The Nervous System: Communication. Neurons are masses of nerve cells that transmit information. Three main components:. (1) Cell Body – contains the nucleus and two extensions. (2) Dendrites – shorter, more numerous, receive information. Brain. Spinal Cord. Nerves. Vocabulary to Know . Homeostasis. The regulation of steady, life-maintaining conditions inside an organism, despite changes in its environment . Nerve Cells . Neurons. Basic functioning units of the nervous system . The Nervous System Central Nervous System Peripheral Nervous System Procedure A starting person will be chosen and will be given an object. Once the teacher gives the signal, the start person will pass the object to their right. The Nervous System Central Nervous System Peripheral Nervous System Procedure A starting person will be chosen and will be given an object. Once the teacher gives the signal, the start person will pass the object to their right. A. Central Nervous System (CNS). 1. . Functions . A) . Acts . as command center. B) . Interprets . sensory information and dictates response based on past experience, . reflexes, . and current body conditions. The parts of central nervous system. The parts of brain. Neuron. is defined as the structural and functional unit of the nervous system. It is otherwise called nerve cell. Neuron is like any other cell in the body having nucleus and all the organelles in the cytoplasm. However, it is different from other cells by two ways: . Deemah. . Dabbagh. Nervous system. Composed of:. Brain (CNS). Spinal cord (CNS). Nerves to body parts (PNS. ). Function:. Maintain . homeostatis. by detecting stimuli in the environment. Structure. THE AUTONOMIC NERVOUS SYSTEM. The autonomic nervous system (ANS) is a motor or efferent system which connects the central nervous system with all smooth muscle, cardiac muscle and gland cells of the body.. Figure 1. Nervous System Hierarchy Characteristics of the Central Nervous System The most fundamental way of categorizing groups of neurons that make up the central nervous system is as nuclei and Human nervous system two major parts: central nervous system and peripheral nervous system. Nervous System Organization. Brain. Spinal cord. Central Nervous System. Nervous System Organization. All neurons outside the CNS. AUTONOMIC NERVOUS SYSTEM. Two major subdivision. Parasympathetic . cranio. -sacral outflow. Sympathetic . . thoraco. -lumbar out flow. Responsible for the visceral control. Sometimes referred to as vegetative control.