An overview of the nervous system the five senses
This presentation is the property of its rightful owner.
Sponsored Links
1 / 35

An Overview of the Nervous System & The Five Senses PowerPoint PPT Presentation


  • 75 Views
  • Uploaded on
  • Presentation posted in: General

An Overview of the Nervous System & The Five Senses. start. What are the two main parts of the central nervous system? Head and Shoulders Spinal cord and Brain Heart and Brain Heart and Head. What makes up the peripheral nervous system? Spinal Cord and Brain Heart and Head

Download Presentation

An Overview of the Nervous System & The Five Senses

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


An overview of the nervous system the five senses

An Overview of the Nervous System & The Five Senses

start


An overview of the nervous system the five senses

What are the two main parts of the central nervous system?

  • Head and Shoulders

  • Spinal cord and Brain

  • Heart and Brain

  • Heart and Head


An overview of the nervous system the five senses

What makes up the peripheral nervous system?

  • Spinal Cord and Brain

  • Heart and Head

  • The Sensory Organs (Eyes, Ears, Nose, Tongue, Skin) and Nerves

  • Skin and Brain


Wrong try again

Wrong! Try Again!

Back to question…


Wrong try again1

Wrong! Try Again!

Back to question…


Correct

Correct!

The Eyes,

Ears,

Nose,

Tongue,

Skin,

and Nerves.

These Sensory organs contain neurons called Receptors.

Receptors are nerve cells that detect conditions in

the body’s environment. Each Receptor sends a signal

through nerves to the central nervous system.

Click here to learn about the eye, ear, nose, tongue, skin, or nerves.


Learn more about nerves

Learn more about nerves

Nerves are bundles of nerve cells, or neurons. Neuron is a specialized cell that can receive signals and transmit them to other neurons.

Dendrites

Cell body

Axon

Dendrites

Nucleus

Click here to learn about the eye, ear, nose, tongue, skin or summary.


An overview of the nervous system the five senses

The dendrites are small thin extensions of the neuron that receive impulses from other neurons and pass them on to the cell body.

Back to the nerve…


An overview of the nervous system the five senses

The nucleus is the control center of the neuron.

Back to the nerve…


An overview of the nervous system the five senses

An Axon is a fiber extending from a neuron that passes messages on to other neurons.

Back to nerve…


Correct the spinal cord brain

Correct! The Spinal Cord & Brain

Spinal Cord

Brain

Next question…


Learn more about our sense of sight

Learn more about our sense of Sight

Iris

Optic Nerve

Cornea

Pupil

Lens

Retina

Iris

Eye receptors detect light and color.

Click here to learn about the ear,nose, tongue, skin, nerves, or summary.


An overview of the nervous system the five senses

The Cornea is the clear, protective covering of the eye.

Back to the eye…


An overview of the nervous system the five senses

The Iris is the color of the eye.

Some eyes may be:

Brown

Blue

Green

Hazel

Back to the eye…


An overview of the nervous system the five senses

The Pupil is the opening that lets light in.

When there is not a lot of light our Pupils become big.

When it is very bright outside our Pupils become small.

Back to the eye…


An overview of the nervous system the five senses

The Lens bends light to help you focus on an object.

Back to the eye…


An overview of the nervous system the five senses

The Retina gathers information about an object and it then sends the information to the brain via the Optic Nerve.

Back to the eye…


An overview of the nervous system the five senses

The Optic Nerve transports pictures to the brain from the Retina.

Back to the eye…


Learn more about our sense of hearing

Learn more about our sense of Hearing

malleus

outer ear

incus

stapes

cochlear nerve

cochlea

middle ear

ear canal

ear drum

Ear receptors detect sound waves.

Click here to learn about the eye, nose, tongue, skin, nerves, or summary.


An overview of the nervous system the five senses

The Malleus, Incus and Stapes are smallest bones in the body and receive sound wave vibrations from the Ear Drum and pass them to the Cochlea.

Back to the ear…


An overview of the nervous system the five senses

The Cochlear Nerve carries the signals to the hearing center, or auditory cortex, on the side of the brain.

Back to the ear…


An overview of the nervous system the five senses

The Cochlea receives vibrations from the Stapes and makes them into nerve signals.

Back to the ear…


An overview of the nervous system the five senses

The Middle Ear is where the Malleus, Incus and Stapes are.

Back to the ear…


An overview of the nervous system the five senses

The Ear Drum is a thin, tight sheet of skin-like material. Sound waves bounce off it, making it vibrate, and pass the vibrations onto the middle ear.

Back to the ear…


An overview of the nervous system the five senses

The Ear Canal funnels sound waves into the skull and ends with the Ear Drum.

Back to the ear…


Learn more about our sense of smell

Learn more about our sense of Smell

Olfactory Bulb

Olfactory Epithelia

Nasal Cavity

Nose receptors detect smells and tastes.

Click here to learn about the eye, ear, tongue, skin, nerves, or summary.


An overview of the nervous system the five senses

The Olfactory Epithelia is on top of the nasal cavity and contains the olfactory cells. Tiny hairs, or cilia, stick out from these cells into the mucus lining the nasal cavity.

Back to the nose…


An overview of the nervous system the five senses

The Olfactory Bulb contains the nerve fibers that carry the signals into the brain.

Back to the nose…


Learn more about our sense of taste

Learn more about our sense of Taste

Bitter (across the back of the tongue)

Sour (upper, side on both sides of the tongue)

Salty (lower, side on both sides of the tongue)

Sweet (across the tip of the tongue)

Click here to learn a fun, new fact about taste!

Mouth receptors detect taste and smells.

Click here to learn about the eye, ear, nose, skin, nerves, or summary.


An overview of the nervous system the five senses

Recently, a fifth taste has been identified. It is called “Umami” which means “delicious” or “yummy” in Japanese.

Back to the tongue…


Learn more about our sense of touch a cross section of the skin

Learn more about our sense of TouchA cross section of the skin

hair

epidermis

dermis

Skin receptors detect heat and cold, pressure, touch, and pain.

Click here to learn more about the eye, ear, nose,tongue, nerves or summary.


An overview of the nervous system the five senses

The Dermis is the second layer of skin and contains most of the touch sensors, as well as tiny blood vessels.

Back to the skin…


An overview of the nervous system the five senses

The Epidermis is the outer layer of skin. It resist wear and tear and continually replaces itself.

Back to the skin…


Summary

Summary

  • Humans have five senses: sight, hearing, smell, taste and touch.

  • The Spinal Cord and the Brain are the two main parts of the central nervous system.

  • The peripheral nervous system consists of eyes, ears, nose, tongue, skin and nerves.

  • Neurons send and receive signals and transmit them to other neurons.

  • Umami is the newest taste.

  • The Epidermis continually replaces itself.

  • Olfactory Cells are our smell cells.

  • The Malleus, Incus and Stapes are the smallest bones in the body.

  • The Lens helps us to focus.

Resources/Further Reading Page

Back to the beginning…


Resources

Resources

Books:

Parker, S., (2004). The Senses. Chicago, IL., Raintree.

Parker, S., (1997). A Look at Your Body Senses. Brookfield, CT., Copper Beech Books.

Websites:

www.faculty.washington.edu

www.teachervision.fen.com

Photos:

www.creativecommons.com

www.faculty.washington.edu

http://library.thinkquest.org

www.enchantedlearning.com

Article:

“Sweet, Sour, Salty, Bitter…and Umami” by Robert Krulwich

http://www.npr.org/templates/story/story.php?storyId=15819485


  • Login