The nervous system is comprised of interconnected systems and subsystems that work together to maintain homeostasis in the human body. It receives information from sensory receptors about internal and external changes through neurons, which are cells that transmit signals through branched dendrites and a single axon. There are three main types of neurons: efferent neurons which conduct motor signals, afferent neurons which conduct sensory signals, and interneurons which connect between neurons.

1. NERVOUS SYSTEM
Prepared by
Rasol Sindy

2. INTRUDUCTION
• The nervous system is very important in helping to
maintain the homeostasis (balance) of the human body.
• A series of sensory receptors work with the nervous
system to provide information about changes in both the
internal and external environments.

3. The human nervous system is a complex ofinter connected
systems in which larger systemsare comprised of smaller
subsystems each of which have specific structures with
specificfunctions.

4. NEURON
Dendrites
DendritesThin branching extensions of the cell body that
conduct nerveimpulses toward the cell body.
Cell body
The main processing center of the
cell.

5. NEURON
• Axon a single branch (in most neurons) which conducts
nerve impulsesaway from the cell body Myelin sheath and
neurilemma are coverings.

6. NEURONS TYPES
 EFFERENT (motor)
 AFFERENT(sensory)
 INTERNEURON