Histology of Nervous Tissue - Collin Collegeiws.collin.edu/ngrose/F2011 BIOL2404/Nervous Tissue...

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Histology of Nervous Tissue

Exercise 17


Nervous System

Figure 11.1


Histology of Nerve Tissue

The two principal cell types of

the nervous system are:

Neurons – excitable

(irritable) cells that transmit

electrical signals

Supporting cells (Neuroglia)

– cells that surround and

wrap neurons


Neurons (Nerve Cells)

Figure 11.4b


Myelin Sheath and Neurilemma: Formation

PLAY InterActive Physiology ®:

Nervous System I, Anatomy Review, page 10

Figure 11.5a–c

../../../DOCUME~1/Bill/LOCALS~1/Temp/Temporary Directory 1 for 11_PPT_Lect.zip/11_PPT_Lect/11PPTLect-anim/IP_Nervous_FILES/9-System Suite/ipweb/systems/nervrevw_pg_10.html


Regions of the Brain and Spinal Cord

White matter – dense collections of myelinated

fibers

Gray matter – mostly soma and unmyelinated

fibers

http://education.vetmed.vt.edu/Curriculum/VM8054/Labs/Lab9/Lab9.htm

http://www.brainu.org/bu2000.html


Comparison of Structural Classes of Neurons

Table 11.1.2


Classification by Function

Sensory (afferent) – carry impulse from external

and internal environments to CNS

Motor (efferent) – carry impulse from CNS to

effector organ

Interneurons (associative) –neurons between

pathways connecting sensory and motor neurons

Secondary neurons

Histology of Nervous Tissue - Collin Collegeiws.collin.edu/ngrose/F2011 BIOL2404/Nervous Tissue...

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