Anatomy - Nervous System

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Presentation transcript:

Anatomy - Nervous System Characteristics & Functions of the Nervous System November 28, 2017

Anatomy-Nervous System Introduction What do you know about the nervous system?

Anatomy-Nervous System Objectives Students will be able to: Define terms relative to the nervous system. Identify characteristics & functions of the nervous system.

Anatomy-Nervous System Terminology Central The center Originating from the center Peripheral Away from the center Outer part of a body system

Anatomy-Nervous System Terminology Sensory Relating to senses or sensation Impulse travels toward spinal cord & brain Motor Movement Impulse travels from brain & spinal cord

Anatomy-Nervous System Divisions Central Nervous System (CNS) Consist of the brain & spinal cord Control center of the body Receives sensory information & responds to it Protected by bone

Anatomy-Nervous System Divisions Sensory & Motor Response Place your pen/pencil on your desk. Look at where it is Close your eyes Find & pick up your pen/pencil

Anatomy-Nervous System Divisions Describe what happened in order of occurrence Reached for pen/pencil Stimulus of touching pen/pencil triggered nerve impulse in sensory nerves in fingers Sensory impulse traveled through spinal cord to brain, giving you clues that object was a pencil Motor impulse sent back to fingers through spinal cord and you pick up pen/pencil

Anatomy-Nervous System Divisions Peripheral Nervous System (PNS) Nerves located outside the CNS Nerves connect CNS to other parts of body Consists of sensory & motor nerves Not protected by bone

Anatomy-Nervous System Divisions Peripheral Nervous System (PNS) Consists of nerves only 43 pairs of nerves 12 cranial nerves 31 spinal nerves

Anatomy-Nervous System Peripheral Nervous System Autonomic Regulates involuntary action Controls smooth muscle, cardiac muscle & glands

Anatomy-Nervous System Peripheral Nervous System Somatic Regulates voluntary action Controls skeletal muscle action

Anatomy-Nervous System