NERVOUS TISSUE
ARAGON, FELIZZ STEFANN
COSTUYA, DANNAH KATE
GEPILANO, ERIKA GABRIELLE
RAMA, JUSTINE MAE
BS MT 1C GROUP 8
“T...
This tissue arises
from the embryonic
ectodermal cells.
The essential
functions of the
nervous tissues
are:
-The reception
of environmental
stimuli, and
Transmission of
impulse to the
nerve centers,
resulting in an
appropriate
sensation or
response.
The nervous
tissue provides
the mechanism
for behavior and
integration of the
function of the
various organs of
the body.
This tissue receives
stimuli for the external
or internal
environment through
specialized cell
structure called
receptors ...
The structural units
of the nervous
tissue which exhibit
highly developed
properties of
excitability are
called neurons or...
Parts of a neutron:
CELL BODY OR
PERIKARYON
This contain a relatively
large nucleus with
scanty chromatin
materials and la...
PROCESSES OF
NEURONS
The axon arises from a
conical elevation on the
perikaryon called the
axon hillock.
AXON
The axon is ...
Axons are bounded by a
non-cellular sheath called
the myelin sheath.
AXON
There are axons that are
not derived by a myelin...
PROCESSES OF
NEURONS
These processes serve as an
extension of the perikaryon.
DENDRITES
Dendrites arise near the
cell body...
The surface of the dendrite
is covered with innumerable
minute projections or spines
which serve as sites of
synaptic cont...
Types of neurons:
As to function:
UNIPOLAR
BIPOLAR
MULTIPOLAR
As to number and processes:
SENSORY
MOTOR
ASSOCIATION OR
INT...
This refers to an axon
together with its
protective sheaths.
NERVE FIBER
Within the central
nervous system is
called the n...
Structure of a nerve fiber: MYELIN SHEATH
A lipid covering of a nerve fiber in the peripheral
nervous system produced by S...
Structure of a nerve fiber:
NODE OF RANVIER
Seen as periodic constriction along
the myelin sheath.
Structure of a nerve fiber: INCISSURE OF
SCHMIDT-
LANTERMANN
Interruptions in form of
oblique clefts at
internodes.
Structure of a nerve fiber:
SHEATH OF
SCHWANN
Transparent membrane
composed of a single of
layer cells surrounding
the mye...
Structure of a nerve fiber:
ENDONEURIUM
Also known as sheath of Henle or Key – Retzius; of
fine delicate connective tissue...
Properties of Nerve Fibers:
Highly irritable
conductorFollows “all or non”
law
Conductivity;
impulse only
confined to
stim...
Nervous tissue
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Nervous tissue

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Nervous tissue

  1. 1. NERVOUS TISSUE ARAGON, FELIZZ STEFANN COSTUYA, DANNAH KATE GEPILANO, ERIKA GABRIELLE RAMA, JUSTINE MAE BS MT 1C GROUP 8 “TO GOD BE THE GLORY ALWAYS!”
  2. 2. This tissue arises from the embryonic ectodermal cells.
  3. 3. The essential functions of the nervous tissues are: -The reception of environmental stimuli, and
  4. 4. Transmission of impulse to the nerve centers, resulting in an appropriate sensation or response.
  5. 5. The nervous tissue provides the mechanism for behavior and integration of the function of the various organs of the body.
  6. 6. This tissue receives stimuli for the external or internal environment through specialized cell structure called receptors which transmit these nerve impulses to the nerve centers where they are reorganized and interpreted.
  7. 7. The structural units of the nervous tissue which exhibit highly developed properties of excitability are called neurons or nerve cells.
  8. 8. Parts of a neutron: CELL BODY OR PERIKARYON This contain a relatively large nucleus with scanty chromatin materials and large nucleolus. Its matrix the neuroplasm is basophilic and contains organelles that include the Nissl’s bodies or chromophilic substance, cytoskeletal filaments called neurofibrils.
  9. 9. PROCESSES OF NEURONS The axon arises from a conical elevation on the perikaryon called the axon hillock. AXON The axon is devoid of Nissl’s bodies and is thinner and much larger than the dendrites of the same neuron.
  10. 10. Axons are bounded by a non-cellular sheath called the myelin sheath. AXON There are axons that are not derived by a myelin sheath and are called unmyelinated axons. There are axons that are not derived by a myelin sheath and are called unmyelinated axons.
  11. 11. PROCESSES OF NEURONS These processes serve as an extension of the perikaryon. DENDRITES Dendrites arise near the cell body. Dendrites are thick but tapered towards the end. Dendrites are relatively short and may be divided into numerous branches by variable sizes and shapes.
  12. 12. The surface of the dendrite is covered with innumerable minute projections or spines which serve as sites of synaptic contact. DENDRITES Its neuroplasm contains neurofibrils, Nissl bodies, mitochondria and free ribosomes.
  13. 13. Types of neurons: As to function: UNIPOLAR BIPOLAR MULTIPOLAR As to number and processes: SENSORY MOTOR ASSOCIATION OR INTERNUNCIAL
  14. 14. This refers to an axon together with its protective sheaths. NERVE FIBER Within the central nervous system is called the nerve tract, and outside of it is simply called a nerve.
  15. 15. Structure of a nerve fiber: MYELIN SHEATH A lipid covering of a nerve fiber in the peripheral nervous system produced by Schwann cells.
  16. 16. Structure of a nerve fiber: NODE OF RANVIER Seen as periodic constriction along the myelin sheath.
  17. 17. Structure of a nerve fiber: INCISSURE OF SCHMIDT- LANTERMANN Interruptions in form of oblique clefts at internodes.
  18. 18. Structure of a nerve fiber: SHEATH OF SCHWANN Transparent membrane composed of a single of layer cells surrounding the myelin sheath for all peripheral nerves, segmented by the nodes of Ranvier. Schwann cells in intermodal regions are vital in regeneration of nerve in case of injury.
  19. 19. Structure of a nerve fiber: ENDONEURIUM Also known as sheath of Henle or Key – Retzius; of fine delicate connective tissue fibers and cells located outside of the neurilemma.
  20. 20. Properties of Nerve Fibers: Highly irritable conductorFollows “all or non” law Conductivity; impulse only confined to stimulated axon and its branches to the synapse. Impulse along an axon can be weakened or blocked by heat, cold, pressure, drugs, electric current or anesthetics.

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