@gielvryll
HUMAN ANATOMY AND PHYSIOLOGY WITH PATHOPHYSIOLOGY
1ST YEAR – 1ST SEMESTER
BACHELOR OF SCIENCE IN MEDICAL LABORATORY SCIENCE
V
NERVOUS SYSTEM
• Master control and communication
system of the body.
FUNCTIONS OF NERVOUS SYSTEM
• Provides for higher mental function
and emotional expression.
• Regulates and maintains
homeostasis.
• Regulates the activities of muscles
and glands.
CLASSIFICATION OF NERVOUS SYSTEM
STRUCTURAL CLASSIFICATION
• Central Nervous System
- Brain and Spinal cord
- Act as the integrating and
command centers of the nervous
system.
• Peripheral Nervous System
- Spinal Nerves and Cranial Nerves
- Nerves serve as communication
lines.
FUNCTIONAL CLASSIFICATION:
• Sensory Division or Afferent Division
- Consists of nerves that convey
impulses to the central nervous
system from sensory receptors
located in various parts of the
body.
- Somatic sensory fibers
o Fibers delivering impulses
from the skin, skeletal
muscle, and joints.
- Visceral sensory fibers
o Transmit impulses from
visceral organs.
• Motor division or Efferent division
- Carries impulses from the CNS to
effector organs, the muscles, and
glands.
- Two Subdivisions of Motor
Division
1. Somatic Nervous System
o Allows us to consciously,
or voluntarily, control our
skeletal muscles.
2. Autonomic Nervous System
o Regulates events that are
automatic, or involuntary,
such as the activity of
smooth muscle, cardiac
muscle, and glands.
o Sympathetic Nervous
System
o Parasympathetic Nervous
System
