1. Unit 3: Integration Station: The Nervous System
Chapter 9
Part 1: Organization of the Nervous System
Part 2: Nervous Tissue: Structure & Function
Part 3: Central Nervous System
Part 4: Peripheral Nervous System
Part 5: Developmental Aspects of the Nervous System & Drug Use

2. The Nervous System Part 1: Organization of the Nervous System
Human Anatomy & Physiology
The Nervous System Part 1: Organization of the Nervous System

3. Do now: 9.1 Objective: Think Ink…Pair Share
Unit 3: Integration Station: The Nervous System
9.1
Aim: What are the functions and parts of the nervous system?
AGENDA
Introduction
Mini-Lesson
Summary
Work Period
Exit Slip
Do Now
Objective:
I will describe the function of the nervous system and name the major divisions.
SC.912.L.14.21
Do now:
Think Ink…Pair Share

4. Unit 3: Integration Station: The Nervous System
Functions of the Nervous System
1. Sensory input – gathering information
To monitor changes occurring inside and outside the body
“Changes” = stimuli
Examples: Temperature, Sound,
Pain, Etc.
2. Integration
To process and interpret sensory input and decide if action is needed

5. Functions of the Nervous System
3. Motor output (Homeostasis!)
A response to integrated stimuli
The response activates muscles or glands

6. Structural Classification of the Nervous System
Central Nervous System (CNS) Contains the:
Brain
Spinal cord
Peripheral Nervous System (PNS)
Nerves outside the brain and spinal cord
Includes Cranial Nerves & Spinal Nerves

7. Basic Divisions of the Nervous System
Figure 12.2

8. Functional Classification of the PNS
PNS structures are divided into two subdivions
1. Sensory (afferent) division
Nerve fibers that carry information to the central nervous system from the body.

9. Functional Classification of the PNS
Receptors located in various parts of the body send signals TO the brain
LOCATIONS:
Skin, Skeletal Muscles & Joints = Somatic Sensory Fibers
Visceral Organs = Visceral Sensory Fibers

10. Functional Classification of the PNS
Motor (efferent) division
Nerve fibers that carry impulses away from the central nervous system to organs, muscles, & glands.
The impulses
“effect” (bring about)
a motor response.

11. Functional Classification of the PNS
Motor (efferent) divisions
Two subdivisions
1. Somatic Nervous System = voluntary (skeletal)
2. Autonomic Nervous Nystem = involuntary
(smooth muscle, cardiac, & glands)

12. PAGE 250 & 252

13. Organization of
the Nervous
System

14. The Nervous System Part 2: Nervous Tissue – Structure & Function
Human Anatomy & Physiology
The Nervous System Part 2: Nervous Tissue – Structure & Function
Unit 3: Integration Station: The Nervous System

15. Unit 3: Integration Station: The Nervous System
Nervous Tissue: Neurons
Neurons = nerve cells
Cells specialized to transmit messages
Major regions of neurons
1. Cell Body - contains the nucleus and two extensions
2. Dendrites – shorter, more numerous, receive information
3. Axons – single, long “fiber” which conducts impulse away from the cell body, sends information
Unit 3: Integration Station: The Nervous System

16. Using the given words and the article label the diagram. (Drawing #1)
Unit 3: Integration Station: The Nervous System

17. Unit 3: Integration Station: The Nervous System
Neuron Anatomy (Drawing 1)
Unit 3: Integration Station: The Nervous System

18. Unit 3: Integration Station: The Nervous System
Nervous Tissue: Support Cells (Neuroglia) Four Types
1. Astrocytes
Abundant, star-shaped cells
Brace neurons
Form barrier between capillaries and neurons
Control the chemical environment of the brain
Unit 3: Integration Station: The Nervous System

19. Unit 3: Integration Station: The Nervous System
Nervous Tissue: Support Cells
2. Microglia
Spider-like phagocytes
Dispose of debris
Respond to immunological alarms
3. Ependymal cells
Line cavities of the brain and spinal cord
Circulate cerebrospinal fluid
Unit 3: Integration Station: The Nervous System

20. Unit 3: Integration Station: The Nervous System
Nervous Tissue: Support Cells
4. Oligodendrocytes
Provide insulation around the axons
Unit 3: Integration Station: The Nervous System

21. Nervous Tissue: Support Cells (Neuroglia) Five Types

22. Nervous Tissue: Support Cells
5. Schwann cells
Form insulating myelin sheath around the neurons