We think you have liked this presentation. If you wish to download it, please recommend it to your friends in any social system. Share buttons are a little bit lower. Thank you!
Presentation is loading. Please wait.
Published bySarah Smith
Modified over 4 years ago
JAMES VALLEY VOCATIONAL TECHNICAL CENTER
Neuron: Nerve Cell n Basic structural unit nervous system n Consists of: –nucleus –nerve fibers /dentrites –axon
Nerves n Sensory Nerves: –carry messages to brain and spinal cord from body n Motor Nerves: –carry messages from brain and spinal cord to body
n Connecting or Mixed Nerves: –Carry both sensory and motor messages
Divisions of CNS n CNS - central nervous system: –consists of brain and spinal cord
n Peripheral Nervous System –a. any nerves outside the brain and spinal cord –b. Autonomic nervous system: controls involuntary body functions
Central Nervous System n 1. Brain: –a. Mass of nerve tissue –b. Protected by membranes & the cranium or skull
C. Cerebrum n Largest section of the brain n Responsible for: –reasoning, thought, memory, speaking, sensstion, sight, hearing, voluntary body movement
D. Cerebellum n Responsible for: –coordination of muscles, balance, posture, & muscle tone
E. Midbrain n Responsible for: –conducting impulses between brain parts –certain eye reflexes
Pons n Responsible for: –conducting messages to other parts of the brain –Reflex actions such as chewing, production of saliva
G. Medulla Oblongata n Lowest part of brain stem n Connects to the spinal cord n Responsible for: –regulating heart beat, respirations, swallowing, coughing, b/p
2. Spinal Cord n Goes down back of body from Medulla Oblongata n Surrounded and protected by vertebrae n Responsible for reflex actions n Carries sensory and motor messages
3. Meninges n Consists of 3 membranes n Covers and protects the brain and spinal cord
Three Membranes n C. Dura mater –thick, tough outer layer n D. Arachnoid membrane –middle delicate weblike layer n E. Pia mater –inner most layer with blood vessels to nourish the nerves
4. Ventricles n Four hallow spaces located in the middle of the brain. n Connected to each other n Filled with fluid called cerebrospinal fluid
Cerebrospinal Fluid n Circulates continuously n Serves as shock absorber to protect brain and spinal cord
n Carries nurients to parts of brain and spinal cord n helps remove metabolic products & wastes n after circulation, absorbed into the blood vessels of the dura mater.
Peripheral Nervous System n Made of all nerves outside the brain and spinal cord n Consists of cranial and spinal nerves
A. Cranial Nerves n 12 pairs & their branches n Some responsible for special senses: sight, hearing, taste, smell n Others receive sensations: touch, pressure, pain, temperature
B. Spinal Nerves n 31 pairs & their branches n carries messages to & from the spinal cord n Both sensory and motor nerves
n 31 spinal nerves: –8 cervical –12 thoracic –5 lumbar –5 sacral –1 coccygeal
3. Autonomic Nervous System n Helps maintain a balance in involuntary functions of the body. But allows the body to react in times of emergency.
2 divisions of ANS n Sympathetic nervous system –acts in emergency n Parasympathetic –counter acts the sympathetic ns after the emergency
n SNS –increase heart rate –increase resp. rate –increase b/p –decrease digestive system activity n PNS –decrease heart rate –decrease resp. rate –decrease b/p –increase digestive system activity
The Nervous System Dont get nervous about the nervous system.
Principles of Health Science Peripheral nervous system is made of all of the nerves. PNS consists of cranial nerves and spinal nerves.
Overview The Nervous System. The nervous system of the human is the most highly organized system of the body. The overall function of the nervous system.
Nervous System Sports Training and Physiology Kociuba lic=1&article_set=59295&cat_id=20607.
The Nervous System.
The Meninges Dura mater - outermost layer Arachnoid mater - no blood vessels, in between layer (resembles a spider web) Pia mater -inner membrane, contains.
Nervous System Outline
Principles of Health Science There are two main divisions of the nervous system: The Central Nervous System The Peripheral Nervous System Divisions.
The Nervous System Lesson 1: An Overview. Upon completion of this lesson, students should be able to … List the functions of the nervous system. Identify.
Chapter 7:6 The Nervous System.
Human Systems: Nervous System & Sense Organs
Anatomy & Physiology Nervous System.
3.01 Remember the structures of the nervous system
The Nervous System. The Nervous System: Chief control system; voluntary or involuntary Responds to changes in/out of body 100 Billion cells throughout.
What’s Next in Biology Class?. Optical Illusion 1 Optical Illusion 12.
Coverings of the CNS 1) Bone – Cranium, Vertebrae 2) Meninges – Three connective tissue membranes covering the brain and spinal cord a) Dura Mater – outermost,
Chapter 9. Central Nervous System (CNS) Brain and spinal cord Peripheral Nervous System (PNS) ◦ nerves.
Nervous system is sensitive to pressure, taste, hormone levels, and light, sound and blood pH levels Converted to signals and sent to the brain via.
What helps you remember your part in a play?
© 2019 SlidePlayer.com Inc. All rights reserved.