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ASWATHY NAIR I JVictory College Of Teacher Education

Olathanni,NeyyatinkaraReg No : 18114388006

NATURAL SCIENCE

NERVOUS SYSTEM

The Nervous system control andcoordinates body activities. The brainand the spinal chord form the centreof the nervous system. Nerves carryimpulses from the sense organs tobrain. It is then that we feel the senseof sight, hearing, touch, taste etc

BRAIN PARTS

It is the largest part of the brain. Itconsists of millions of neurons. It isthe seat of sensation, memory,intelligence, thinking, reasoning,imagination etc

Cerebrum

It is a nerve centre seen below thecerebrum. It controls thetransmission of impulses to thecerebrum and from the cerebrum

Thalamus

The hypothalamus is situated justbelow the Thalamus. The centersthat regulate the sense of hunger,thirst and body temperature arefound here

Hypothalamus

It is the lowest part of the brain. Ithas nerve centers that controlheart beat, respiratory movementsetc. The spinal cord is acontinuation of this part

Medulla Oblongata

The spinal chord is thecontinuation of themedulla oblongata and isplace inside the vertebralcolumn. It extends up tothe lower end of thevertebral column

Spinal Chord

Functions of The Spinal Chord

Spinal Chord Transmits the impulses reaching from different parts of the body to brain. It transmits the impulses from Cerebrum to various parts of the body. It acts as the centre of reflex action

Nerves

Nerves are spreadeverywhere in the body.They carry impulses fromthe sense organs to thebrain and spinal cord andvice versa

The control and co-ordination of thebody activities are performed by thenervous system. The cortex in humanis larger than that of any other animalsand it contain more nervous than thebrain of any other animals. This is thereason that makes man superior to allcreatures.

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