The Five Senses By Astrit, Sam, Vicky, Nick, and Madison.

The Five Senses

By Astrit, Sam, Vicky, Nick, and Madison

The Five Senses

•1. Taste (Astrit)•2. Smell (Nick)•3. Sound (Sam)•4. Sight (Vicky)•5. Touch (Madison)

TasteTaste• 5 primary taste sensations

-Salty: Subdues Bitterness.-Sweet: Pleasant Taste.-Bitter: Prevents harmful events in body.-Sour: Rids Harmful Substances.-Umami: Japanese for good flavor; Meaty Taste.

• Humans receive taste through sensory organs called taste buds.

• Taste is the weakest of the 5 senses.• Taste buds are formed by two types of cells.

-Supporting Cells-Gustatory Cells

• Girls have more taste buds than boys.

SoundHearing• You need two ears to be able to locate where a sound originated.• Hertz are number of sound waves per unit of time.

Humans have about 20,000 hertz.

Parts of the Ear• The ear is divided into 3 sections:

-the outer ear

-the middle ear

-the inner ear• The outer ear includes your skin on the ear flap. It is the part of the

ear that is visible.• The middle ear includes the eardrum, and the three tiny bones known

as the hammer, the anvil, and the stirrup. A tube in the middle ear connects it to the nose.

• The inner ear includes the cochlea, and the Eustachian tube, which connects the inner ear to the brain. They turn sound waves into nerve signals which are then sent to the brain where they are processed.

SightEyes and Eyesight

• Eyes are organs that detect light.

• They are the second most complex organs in your body after your brain.

• Light is converted into electro-chemical impulses to help you understand what you see.

Parts of the Eye

• The eye has 5 major parts:

-Cornea: Lets light into the eye

-Pupil: Allows light further through the eye to the lens

-Lens: Brings light into focus

-Retina: Turns light into electrical impulses.

-Optic Nerve: Sends impulses to the brain.

• The retina contains 2 types of photoreceptors:

-Cones: Sensitive to light and color.

-Rods: Sensitive to dim light.

TouchTouch• Touch- To place the hand or finger on something and come in contact

with it.• Touch can act as an early warning system for the body.• Touch develops before all the other senses.• There are 3 kinds of touch sensations.

-cold-heat-pain

• Hair on the fingertips have a greater concentration of nerves. • Through touch we detect different textures and temperatures.• The skin is a huge factor of nerves that keep the brain in touch with

the outside world.• The sense of touch never turns off or takes a break. It works longer

than all the other senses.• Touch is spread through the whole body. Nerve endings in the fingers

and other parts of the body connect the sense of touch with the brain.• Touch protects us from serious harm by sending our brain important

outside information.

Smell Smell• You breathe in air particles through your nose, causing a

sensation called smell.

• When you smell these particles, the air around it is moistened in the nasal cavity.

• The hair in your nose is called air cilia, or just cilia.

• After air passes through the nasal cavity it moves through a thick layer of mucus to the olfactory bulb. There smells are recognized by the nerves.

• Dogs have 1 million olfactory cells per nostril and their olfactory cells are 100 times larger than humans olfactory cells.

• Your nose at it best can ell the difference between 4,000-10,000 smells.

• As you get older, your sense of smell gets worse.

• Smell is most accurate between the ages of 30 and 60 years old

• Women of all ages generally have more accurate senses of smell.

Using All Five SensesUsing All Five Senses