Nervous, Integumentary and
Immune Systems
Finz 2014
Nervous System:
• Function:- The electrical system of the
body.
- Control/coordinate body functions and
respond to external stimuli
Neurons:- Cells that carry electrical signals
throughout the body.
Three Types:
1)Sensory carry signal from sense organs to
spinal cord/brain.
2)2) Motor carry signal from brain/spinal cord to
muscles and glands.
3)3) Interneurons connect sensory and motor
neurons.
Central Nervous System (CNS):
• Brain has three parts to it.
• 1) Cerebrum receives sensory impulses and
coordinates muscle response and thinking
impulses.
• 2) Cerebellum coordinates voluntary muscle
movements and balance.
• 3) Brain Stem controls involuntary
functions, such as breathing, swallowing,
blood pressure, etc.
• Spinal Cord links the brain with parts of
the body and controls reflexes.
Peripheral Nervous System
(PNS):
• All other nerves except the brain &
spinal cord.
• Sensory division transmits signals from
sensory organs to CNS.
• Motor division transmits signals from
CNS to muscles or glands.
Integumentary System:
• Function: protection and temperature
regulation of the body.
• Structure: skin has layers called
epidermis and dermis. Melanin gives
color.
• Sweat glands cool body.
• Oil glands condition and waterproof
skin.
• Hair and nails are also a part of this
system.
What causes Hair Shape?
ACNE!!
• Immune System:
contains lymph fluid
that travels through
vessels and nodes to
filter and remove
harmful materials from
your body.
• Some White blood cells
are made in the lymph
nodes. Most WBC’s are
made in the bone
marrow of the skeletal
system.
The Immune System protects
your body from invaders
The Heavy Hitters in the Immune
System
When a invader enters the body: