The Nervous System PDF

THE NERVOUS SYSTEM Presentation by: Marhela Nicole M. Castro THE NERVOUS SYSTEM THE NERVOUS SYSTEM The nervous system is a complex network of nerves and cells that carry messages to and from the brain and spinal cord to various parts of the body. It connects all your body parts and t...

THE NERVOUS SYSTEM Presentation by: Marhela Nicole M. Castro THE NERVOUS SYSTEM THE NERVOUS SYSTEM The nervous system is a complex network of nerves and cells that carry messages to and from the brain and spinal cord to various parts of the body. It connects all your body parts and transmit signal from one part to another.  It is a system of cells, tissues and organs that regulates the body's responses to internal and external NOTE: Each part of thestimuli. nervous system has a specific role as it functions as an important part of the system.  Major Divisions and Parts of the Nervous System 1. Central Nervous System (CNS) 2. Peripheral Nervous System (PNS) CENTRAL NERVOUS SYSTEM I. Central Nervous System (CNS) serves as the main processing center of the nervous system. It consists of two main components, namely; Two Main Components of CN A. Brain B. Spinal Cord  A. BRAIN Brain is an organ located within the skull that functions as organizer and distributor of information for the body. It has three main parts: 1. Cerebrum is the large, upper part of the brain that controls activity and thought. 2. Cerebellum is the part under the cerebrum that controls posture, balance, and coordination. 3. Brain stem connects the brain to the spinal cord and controls automatic functions such as breathing, digestion, heart rate, and blood  3 MAIN PARTS OF THE BRAIN 1. Cerebrum is the large, upper part of the brain that controls activity and thought. 2. Cerebellum is the part under the cerebrum that controls posture, balance, and coordination. 3. Brain stem connects the brain to the spinal cord and controls automatic functions such as breathing, digestion, heart rate, and blood pressure. B. SPINAL CORD Spinal cord serves as a channel for signal between the brain and the majority of the body parts, and controls some simple musculoskeletal reflexes even without the processing of the brain. PERIPHERAL NERVOUS SYSTEM II. Peripheral Nervous System (PNS) connects the central nervous system to the organs and limbs. It has two main divisions: Two Main Divisions of PNS A. Somatic Nervous System B. Autonomic Nervous System A. SOMATIC NERVOUS SYSTEM A. Somatic Nervous System is associated with the voluntary control of body movements and has two main parts: 1. Spinal Nerves - carry motor and sensory signals between the spinal cord and the body. 2. Cranial Nerves - are nerve fibers that carry information into and out of the brain stem. B. AUTONOMIC NERVOUS SYSTEM B. Autonomic Nervous System is associated with the involuntary control of body movements and has two subdivisions: 1. Sympathetic Nervous System is activated when the body is in a dynamic role or stress. (e.g., increased heart rate and breathing, dilation of pupil, sweating) 2. Parasympathetic Nervous System maintains body functions and restores the body to normal or relaxed mode.  THANK YOU I hope you can get useful knowledge from this presentation. Good luck !