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Principles of Health Science 2012
Peripheral nervous system is made of all of the nerves. PNS consists of cranial nerves and spinal nerves.
12 pairs and their branches Originate in the brain Cranial Nerves
Some are responsible for special senses such as sight, hearing, taste, and smell.
Some receive general sensations such as touch, pressure, pain, and temperature, and send out impulses for involuntary and voluntary muscle control
31 pairs and their branches Carry messages to and from the spinal cord Both sensory (afferent) and motor (efferent) nerves Spinal Nerves
Consists of the following pairs: 8 cervical 12 thoracic 5 lumbar 5 sacral 1 coccygeal
Each nerve goes directly to a particular part of the body or networks with other spinal nerves to form a plexus that supplies sensation to a larger segment of the body.
Important part of the peripheral nervous system Helps maintain a balance in the involuntary functions of the body BUT also allows the body to react in times of emergency Autonomic Nervous System
There are two divisions of the ANS: Sympathetic Parasympathetic
Sympathetic and parasympathetic work together Functions include: 1. Maintain a balanced state (homeostasis) 2. Control involuntary body functions at proper rates
Acts in times of emergency: fight or flight Prepares body to act Increases heart rate and respirations Raises blood pressure Slows activity in digestive tract Sympathetic Nervous System
Counteracts actions of sympathetic after the emergency Slows heart rate and respirations Lowers blood pressure Increases activity in digestive tract Parasympathetic Nervous System
JAMES VALLEY VOCATIONAL TECHNICAL CENTER. Neuron: Nerve Cell n Basic structural unit nervous system n Consists of: –nucleus –nerve fibers /dentrites –axon.
Functions of the Nervous System Sensory input — gathering information –Sight, Touch, Hearing, Tasting & smelling Tasting & smelling –To monitor changes.
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Nervous System Responsible for coordinating the many activities performed inside and outside the body Every square inch of the human body is supplied with.
Two types of cells in the peripheral nervous system * SENSORY NERVOUS CELLS *MOTOR NERVOUS CELLS.
Chapter 7:6 The Nervous System.
Sensory Function- Can sense a change in the body; hearing, seeing, smelling, taste, touch (pressure, pain, cold etc) balance. Integrative Function-
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The eleven organ systems of the human body work together to maintain homeostasis Homeostasis is the internal balance of the body Within the body are levels.
The Peripheral Nervous System. Peripheral Nervous System 31 pairs of spinal nerves 12 pairs of cranial nerves All of the smaller nerves that branch from.
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Bell ringer Where can you find a sensory neuron? Interneuron? Motor neuron?
Nervous System. 6/3/2016Nervous System2 Functions Coordinates all of the activities of the body. Enables the body to respond and adapt to changes both.
Nervous System & Senses. Neuron A neuron is the basic unit of the Nervous System. Carry messages in the form of electrical impulses.
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Introduction to:. The Nervous System Highly organized network of billions on neurons and even more neuroglia Contains: Brain Cranial Nerves Spinal.
Nervous System Central Nervous System (CNS) Peripheral Nervous System (PNS)
+ Peripheral Nervous System. + PERIPHRAL NERVOUS SYSTEM PNS LIES OUTSIDE THE CENTRAL NERVOUS SYSTEM COMOSED OF NERVES NERVES = BUNDLES OF AXONS WE CALL.
Questions of the Day “ WHAT MAKES YOU WHO YOU ARE ? ” Why are you different from Everyone Else” What makes you so similar?
The Nervous System. Reacting to Stimuli In order to maintain homeostasis and survive your body has to be able to react to changes in the environment.
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The Nervous System. Functions of the nervous system include: coordination of the physical movements of the body corresponding to the action of the.
Spinal Cord Brain Nerves PNS consists of 43 pairs of nerves that transmit info to and from CNS 12 pairs of cranial nerves enter the brain directly 31.
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Chapter 14 Peripheral nervous system. Introduction G Consist of: Cranial and spinal nerves G PNS made Somatic - oversees voluntary activities of G Autonomic.
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The Brain and The Nervous System. Brain Facts The brain weighs 3 pounds. The brain consumes 20-30% of the body’s energy. There are about 100 billion neurons.
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17-1 The Central Nervous System The central nervous system (CNS) consists of the spinal cord and brain. The CNS receives and sends sensory input and coordinates.
Stage 1 Psychology Human Nervous System. The nervous system is made up of several parts. The Central Nervous System (CNS) is made up of the areas encased.
Ms. Herrera. Spinal Cord Extends from the foramen magnum of the skull to the first or second lumbar vertebra Comprised of 31 pairs of spinal nerves 8.
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Anatomy of the Nervous System Central nervous system (CNS) Brain Spinal cord Peripheral nervous system (PNS) Nerve outside the brain and spinal.
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The Nervous System Chapter. Learning Targets By end of this lesson, you should be able to: Differentiate between the central and peripheral nervous systems.
Nervous System Supplies information about internal and external environment.
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