SENSITIVITY 5 th GRADE SCIENCE
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SENSITIVITY
5th GRADESCIENCE
UNIT OUTLINESENSITIVITY
Sounds and sign languageThe function of sensitivity
Internal coordination
Senses and organ senses
The nervous system
ENGLISH CATALÀ ENGLISH CATALÀNervous system Taste buds
Brain Touch
Nerves Sense ogans
Neurons Stimuli
Spinal cord Sign language
Send Visibility
Receive Deaf
Hearing Coordinated
Sight Interpret
Sweat gland Disability
Taste Distinguish
THE FUNCTION OF SENSITIVITY
Through the sensitivity, we respond to changes in the external
environment. These changes are called stimuli.
Stimulus is anything that causes a reaction in an organism.
• An animal is cold so it moves into the sun
• If we walk into a room and there is a bad smell, we respond leaving the room.
HOW DOES SENSITIVITY WORK?
SENSE ORGANS
BRAIN
THE LOCOMOTOR SYSTEM
Capture information from the
environment
Receives and interprets the information and
decides how we should respond
Muscles receives orders from the brain and work with bones
to make the body move.
SENS
ES
ORGA
NS
The sense organs capture information from the environment and send it to the brain through the
nerves.
EYES AND SIGHT The light goes into the eye through the pupil
and the lens.
The lens projects the image on the retina.
The retina is made up of cells which notice the
light and the colours.
The information of the image is sent to the
brain through the optic nerve.
EARS AND HEARING The sound goes in through the outer ear
and hits the eardrum.
It passes to the middle ear and the tiny
bones transmit the vibrations to the
inner ear.
The cochlea sends the information to the
brain through the auditory nerve.
SKIN AND TOUCH The information captured by
receptors in the taste buds travels
to the brain through the taste
nerves.
The brain receives and interprets
this information.
THE TONGUE AND TASTE The taste buds are on the tongue. They notice four taste sensations:
- Sour.
- Sweet.
- Salty.
- Bitter. The taste buds send the information to
the brain through the gustative nerve.TASTE BUDS
THE NOSE AND SMELL The nose is made up of the
nostrils and the nasal cavity. On the top of the nasal cavity there
is the pituitary. It is a membrane which notice the smells.
The pituitary sends the information to the brain through the olfactory nerve.
THE NERVOUS SYSTEMThe nervous system receives and responds to information from the five sense.
It controls everything you do!
The nervous system produces reflex actions.
https://www.youtube.com/watch?v=-nH4MRvO-10
https://www.youtube.com/watch?v=sjyI4CmBOA0
THE FIVE SENSES
The nervous system is made up of two parts:
The central nervous system(brain and spinal cord)
The peripheral nervous system(all the nerves in our body)
It is formed by nervous tissue (neurons).
NEURONS Neurons are grouped together to form nerves. They have three parts:
Body. The widest part of the neuron.Dendrites, which receive messages from the sense organs or other neurons.
Axon, which transmit messages to other neurons.https://www.youtube.com/watch?v=JBKKzfRNkAQhttps://www.youtube.com/watch?v=Ta_vWUsrjho
THE CENTRAL NERVOUS SYSTEM
The brain is the control centre of the whole nervous system.
The brain is made up of three parts:CerebrumCerebellumBrain stem
It is the biggest part of our brain. It controls our thoughts, emotions, language, behaviour and voluntary movements.
It is divided into left and right hemispheres.
CEREBRUM
The cerebellum controls balance, movement and coordination.
CEREBELLUM
The brain stem controls involuntary movements
(breathing, digestion...)
It connects the brain to the
spinal cord.
BRAIN STEM
THE CENTRAL NERVOUS SYSTEM
The spinal cord is made up of nerve tissue and runs from our brain down our spine.
It controls reflex actions. (spontaneous actions that protect our bodies from danger)
THE PERIPHERAL NERVOUS SYSTEM
The peripheral nervous system is made up of nerves.
It connects the central nervous system to our sense organs, muscles, internal organs, etc.
1.Sensory neurons transport information from the sensors (eyes, ears, nose, tongue and skin) to the brain (central nervous system).
2.The brain interprets the information and decides how to respond.
3.Motor neurons carry messages away from the brain to the rest of our body and muscles.
THE PERIPHERAL NERVOUS SYSTEM
TEACHER LETICIA
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