The nervous system is made up of nerves and neurons that transmit signals around the body. It has two main parts: the central nervous system (CNS) and the peripheral nervous system. The CNS contains the brain and spinal cord, which act as control centers. The peripheral nervous system connects the CNS to the rest of the body through cranial nerves and spinal nerves. It contains sensory nerves that transmit information to the CNS, and motor nerves that transmit signals from the CNS to effectors like muscles and glands. The autonomic nervous system regulates involuntary functions through the sympathetic and parasympathetic nerves.

1. NERVOUS SYSTEM
By K.chitra

2. Nervous system
The nervous system is a complex collection
of nerves and specialized cells known as
neurons that transmit signals between
different parts of the body. It is essentially
the body's electrical wiring. Structurally,
the nervous system has two components:
the central nervous system and the
peripheral nervous system.

3. COMPONENTS OF NERVOUS SYSTEM

5. NERVOUS SYSTEM
Structure
Function
CENTRAL NERVOUS SYSTEM
BRAIN AND SPINAL CORD
Integrative and control centres.
PERIPHERAL NERVOUS SYSTEM
Cranial Nerves and spinal Nervous
Communication lines between the CNS
and the rest of the body.
Sensory nerves (Afferent nerves)
Somatic and visceral sensory nerve fibers
Conducts impulses from receptor to CNS
Motor nerves(efferent nerves)
Motor nerve fibers
Conducts impulses from CNS to effectors
(Muscles and glands)
Sympathetic nerves
Mobilizes body systems during activity
(“Fight or flight’’ response)
Parasympathetic nerves
Conserves energy
Promotes “house keeping’’ functions
during rest.
Autonomic nerve
system(ANS)
Visceral motor
(involuntary)
Conducts impulses from
the CNS to cardiac
muscles ,smooth muscles
and glands
Somatic nervous
system
Somatic motor
{voluntary)
Conducts impulses
from the CNS to
skeletal muscles.

6. CENTRAL NERVOUS
SYSTEM

7. CNS
CONSIST OF:
• Brain
• Spinal Cord

8. BRAIN

10. COVERING OF BRAIN AND
SPINAL CORD

11. EACH BRAIN CONSIST OF 4 LOBES

12. LOBES
Each brain consist of:
• 1 Frontal
• 2 Parietal
• 2 Temporal
• 1 Occipital

13. FUNCTONS OF EACH LOBE

14. LOBES AND CENTRES OF
BRAIN

15. Layers of brain

16. EMBRIONIC BRAIN

17. LIMBIC SYSTEM
• The limbic system is composed of numerous
structures, including the amygdala, thalamus,
hypothalamus, hippocampus, corpus callosum
(callus), and several other brain segments. The
limbic lobe manages psychological responses
to emotional stimuli.
• It is associated with memory, attention,
emotions, sexual urges, character, and
behavior.

18. LIMBIC SYSTEM