NERVOUS SYSTEM OUTLINE

NERVOUS SYSTEM

FUNCTION

ORGANS

HOW DOES IT WORK?

Relating with the outside.

Brain

Nerves

Spinal Cord

Controls the body. It makes us think and remember.

Long fibres that transmit information around the body

Connects the brain with the nerves.

1st Senses get information (stimulus).

2nd Nerves send the information to the brain.

3rd The brain decides what to do.

4th Nerves send the brain order to the muscles.

5th Muscles do what the brain ordered.

THE FIVE SENSES

SIGHT

HEARING

Eyes: Let us perceive colours, shapes and depth.

Parts

Ocular globe: main part of the eye.

Cornea: protects the eye.

Iris: controls the amount of light that gets into the eye.

Pupil: a hole where light gets into the eyes.

Lens: focuses the light that gets into the eye.

Retina: transforms the light into nervous signals.

Ears: Let us hear and help us keeping our balance.

Parts

Outer ear

Middle ear

Inner ear

Ear

Ear canal

Eardrum

Hammer

Anvil

Stirrup

Cochlea: transforms sound vibrations into nervous signals

THE FIVE SENSES

SIGHT

HEARING

Eyes: Let us perceive colours, shapes and depth.

Parts

Ears: Let us hear and help us keeping our balance.

Parts

Lens

CorneaRetina

Iris

Pupil

Ear

Ear canalEardrum

Hammer

Anvil

Stirrup

Cochlea

THE FIVE SENSES

SMELL

TASTE

TOUCH

Nose: lets us perceive smells.

Tongue: lets us perceive flavours with the taste buds.

Skin: Lets us feel pain, pressure , temperature…

Tastes

Salty: salt, chips…Sweet: sugar, banana…Sour: lemon, vinegar…

Bitter: coffee, dark chocolateUmami: meat, fish…

Layers

Epidermis

Dermis

Hypodermis

Blood vessels

Sweat glands: sweat controls our body temperature.

Sebaceous glands

Sense receptors

THE FIVE SENSES

SMELL

TASTE

TOUCH

Nose: lets us perceive smells.

Tongue: lets us perceive flavours with the taste buds.

Skin: Lets us feel pain, pressure , temperature…

Tastes

Layers