The document discusses the five basic human sense organs: eyes, ears, skin, tongue, and nose. It provides details on the main parts of each sense organ and how they process sensory information, such as how the eyes focus light onto the retina to initiate vision and how sound waves are transmitted through the ear to the cochlea for hearing. The skin contains nerve endings that detect sensations like touch, temperature, and pain.

1. UNIT 2: SENSE ORGANS SENSE ORGANS
ORGAN
SENSE
MAIN
PARTS
PROCESS

2. UNIT 2: SENSE ORGANS SENSE ORGANS
ORGAN EYES EARS SKIN TONGUE NOSE
SENSE
MAIN
PARTS
PROCESS

3. UNIT 2: SENSE ORGANS SENSE ORGANS
ORGAN EYES EARS SKIN TONGUE NOSE
SENSE
MAIN
PARTS
PROCESS

4. UNIT 2: SENSE ORGANS SENSE ORGANS
ORGAN EYES EARS SKIN TONGUE NOSE
Hearing
SENSE SIGHT and TOUCHT TASTE SMELL
balance
MAIN
PARTS
PROCESS

5. UNIT 2: SENSE ORGANS SENSE ORGANS
ORGAN EYES EARS SKIN TONGUE NOSE
Hearing
SENSE SIGHT and TOUCHT TASTE SMELL
balance
MAIN
PARTS
.-
.-
.-
.-
.-
.-
.-
PROCESS

6. UNIT 2: SENSE ORGANS SENSE ORGANS
ORGAN EYES EARS SKIN TONGUE NOSE
Hearing
SENSE SIGHT and TOUCHT TASTE SMELL
balance
MAIN
PARTS
.- CORNEA
.-PUPIL
.-IRIS
.- LENS
.- VITREOUS HUMOR
.- RETINA
.- OPTIC NERVE
PROCESS

7. UNIT 2: SENSE ORGANS SENSE ORGANS
ORGAN EYES EARS SKIN TONGUE NOSE
Hearing
SENSE SIGHT and TOUCHT TASTE SMELL
balance
MAIN
PARTS
.- CORNEA
.-PUPIL
.-IRIS
.- LENS
.- VITREOUS HUMOR
.- RETINA
.- OPTIC NERVE
PROCESS
The light enters in the
eye through the
pupil. The cornea
and lens focus the
image on the
retina.The retina
convert it in nerve
signals that send to
the brain through the
optic nerve.

8. UNIT 2: SENSE ORGANS SENSE ORGANS
ORGAN EYES EARS SKIN TONGUE NOSE
Hearing
SENSE SIGHT and TOUCHT TASTE SMELL
balance
MAIN EAR:
PARTS
.- CORNEA
.-
.-PUPIL .-
.-IRIS EAR:
.- LENS .-Auditory.
.- VITREOUS HUMOR Osicles:
.- RETINA . . . ,
.- OPTIC NERVE and . .
.-
EAR:
PROCESS .-
.-
.-
The light enters in the
eye through the
pupil. The cornea
and lens focus the
image on the
retina.The retina
convert it in nerve
signals that send to
the brain through the
optic nerve.

9. UNIT 2: SENSE ORGANS SENSE ORGANS
ORGAN EYES EARS SKIN TONGUE NOSE
Hearing
SENSE SIGHT and TOUCHT TASTE SMELL
balance
MAIN OUTER EAR:
PARTS
.- CORNEA
.- Auditory Canal
.-PUPIL .- Eardrum
.-IRIS MIDDLE EAR:
.- LENS .-Aud. Osicles:
.- VITREOUS HUMOR Anvil, Hammer
.- RETINA and Stirrup
.- OPTIC NERVE - Eustachian tube
INNER EAR:
.- Cochlea
PROCESS .- Semicircular
canals.
.- Auditory nerve
The light enters in the
eye through the
pupil. The cornea
and lens focus the
image on the
retina.The retina
convert it in nerve
signals that send to
the brain through the
optic nerve.

10. UNIT 2: SENSE ORGANS SENSE ORGANS
ORGAN EYES EARS SKIN TONGUE NOSE
Hearing
SENSE SIGHT and TOUCHT TASTE SMELL
balance
MAIN OUTER EAR:
PARTS
.- CORNEA
.- Auditory Canal
.-PUPIL .- Eardrum
.-IRIS MIDDLE EAR:
.- LENS .-Aud. Osicles:
.- VITREOUS HUMOR Anvil, Hammer
.- RETINA and Stirrup
.- OPTIC NERVE - Eustachian tube
INNER EAR:
.- Cochlea
PROCESS .- Semicircular
canals.
.- Auditory nerve
The light enters in the
eye through the
pupil. The cornea
and lens focus the
image on the
retina.The retina
convert it in nerve
signals that send to
The vibrations on the air enter through the auditory canal. They make
the brain through the vibrate the eardrum, that transmit these vibrations to the Anvil, Hammer
optic nerve. and Stirrup, and finally to the Cochlea. They are changed into nerve
impulses , and sent to the brain through the Auditory Nerve.

11. UNIT 2: SENSE ORGANS SENSE ORGANS
ORGAN EYES EARS SKIN TONGUE NOSE
Hearing
SENSE SIGHT and TOUCHT TASTE SMELL
balance
MAIN OUTER EAR:
PARTS
.- CORNEA .-
.- Auditory Canal
.-PUPIL .- Eardrum Detect:
.-IRIS MIDDLE EAR: .-
.- LENS .-Aud. Osicles: .-
.- VITREOUS HUMOR Anvil, Hammer .-
.- RETINA and Stirrup .-
.- OPTIC NERVE - Eustachian tube
INNER EAR:
.- Cochlea
PROCESS .- Semicircular
canals.
.- Auditory nerve
The light enters in the
eye through the
pupil. The cornea
and lens focus the
image on the
retina.The retina
convert it in nerve The vibrations on the air enter through the auditory canal. They make
signals that send to vibrate the eardrum, that transmit these vibrations to the Anvil, Hammer
the brain through the and Stirrup, and finally to the Cochlea. They are changed into nerve
optic nerve. impulses , and sent to the brain through the Auditory Nerve.
.

12. UNIT 2: SENSE ORGANS SENSE ORGANS
ORGAN EYES EARS SKIN TONGUE NOSE
Hearing
SENSE SIGHT and TOUCHT TASTE SMELL
balance
MAIN OUTER EAR: .- NERVE
PARTS
.- CORNEA
.- Auditory Canal ENDINGS
.-PUPIL .- Eardrum
.-IRIS Detect:
MIDDLE EAR:
.- LENS .- Cold
.-Aud. Osicles:
.- VITREOUS HUMOR Anvil, Hammer .- Heat
.- RETINA and Stirrup .- Contact
.- OPTIC NERVE - Eustachian tube .- Pain
INNER EAR:
.- Cochlea
PROCESS .- Semicircular
canals.
.- Auditory nerve
The light enters in the
eye through the
pupil. The cornea
and lens focus the
image on the
retina.The retina
convert it in nerve
signals that send to The vibrations on the air enter through the auditory canal. They make
the brain through the vibrate the eardrum, that transmit these vibrations to the Anvil, Hammer
optic nerve. and Stirrup, and finally to the Cochlea. They are changed into nerve
.
impulses , and sent to the brain through the Auditory Nerve.

13. UNIT 2: SENSE ORGANS SENSE ORGANS
ORGAN EYES EARS SKIN TONGUE NOSE
Hearing
SENSE SIGHT and TOUCHT TASTE SMELL
balance
MAIN OUTER EAR: .- NERVE
PARTS
.- CORNEA
.- Auditory Canal ENDINGS
.-PUPIL .- Eardrum
.-IRIS Detect:
MIDDLE EAR:
.- LENS .- Cold
.-Aud. Osicles:
.- VITREOUS HUMOR Anvil, Hammer .- Heat
.- RETINA and Stirrup .- Contact
.- OPTIC NERVE - Eustachian tube .- Pain
INNER EAR:
.- Cochlea
PROCESS .- Semicircular
canals.
.- Auditory nerve Nerve endings
The light enters in the in the skin
eye through the detect
pupil. The cornea sensations and
and lens focus the send them to
image on the the brain.
retina.The retina
convert it in nerve
signals that send to
The vibrations on the air enter through the auditory canal. They make
the brain through the vibrate the eardrum, that transmit these vibrations to the Anvil, Hammer
optic nerve. and Stirrup, and finally to the Cochlea. They are changed into nerve
impulses , and sent to the brain through the Auditory Nerve.

14. UNIT 2: SENSE ORGANS SENSE ORGANS
ORGAN EYES EARS SKIN TONGUE NOSE
Hearing
SENSE SIGHT and TOUCHT TASTE SMELL
balance
MAIN OUTER EAR: .- NERVE
PARTS
.- CORNEA .-
.- Auditory Canal ENDINGS
.-PUPIL Detect:
.- Eardrum Detect:
.-IRIS .-
MIDDLE EAR:
.- LENS .- Cold .-
.-Aud. Osicles:
.- Heat .-
.- VITREOUS HUMOR Anvil, Hammer
.-
.- RETINA and Stirrup .- Contact
.-
.- OPTIC NERVE - Eustachian tube .- Pain
INNER EAR:
.- Cochlea
PROCESS .- Semicircular
canals.
.- Auditory nerve Nerve endings
The light enters in the
in the skin
eye through the
detect
pupil. The cornea
sensations and
and lens focus the
send them to
image on the
the brain.
retina.The retina
convert it in nerve
signals that send to The vibrations on the air enter through the auditory canal. They make
the brain through the vibrate the eardrum, that transmit these vibrations to the Anvil, Hammer
optic nerve. and Stirrup, and finally to the Cochlea. They are changed into nerve
.
impulses , and sent to the brain through the Auditory Nerve.

15. UNIT 2: SENSE ORGANS SENSE ORGANS
ORGAN EYES EARS SKIN TONGUE NOSE
Hearing
SENSE SIGHT and TOUCHT TASTE SMELL
balance
MAIN OUTER EAR: .- NERVE
PARTS
.- CORNEA .- TASTE BUDS
.- Auditory Canal ENDINGS
.-PUPIL Detect:
.- Eardrum Detect:
.-IRIS .- Salty
MIDDLE EAR:
.- LENS .- Cold .- Sweet
.-Aud. Osicles:
.- Heat .- Bitter
.- VITREOUS HUMOR Anvil, Hammer
.- Sour
.- RETINA and Stirrup .- Contact
.- TASTE NERVE
.- OPTIC NERVE - Eustachian tube .- Pain
INNER EAR:
.- Cochlea
PROCESS .- Semicircular
canals.
.- Auditory nerve Nerve endings
The light enters in the
in the skin
eye through the
detect
pupil. The cornea
sensations and
and lens focus the
send them to
image on the
the brain.
retina.The retina
convert it in nerve
signals that send to The vibrations on the air enter through the auditory canal. They make
the brain through the vibrate the eardrum, that transmit these vibrations to the Anvil, Hammer
optic nerve. and Stirrup, and finally to the Cochlea. They are changed into nerve
.
impulses , and sent to the brain through the Auditory Nerve.

16. UNIT 2: SENSE ORGANS SENSE ORGANS
ORGAN EYES EARS SKIN TONGUE NOSE
Hearing
SENSE SIGHT and TOUCHT TASTE SMELL
balance
MAIN OUTER EAR: .- NERVE
PARTS
.- CORNEA .- TASTE BUDS
.- Auditory Canal ENDINGS
.-PUPIL Detect:
.- Eardrum Detect:
.-IRIS .- Salty
MIDDLE EAR:
.- LENS .- Cold .- Sweet
.-Aud. Osicles:
.- Heat .- Bitter
.- VITREOUS HUMOR Anvil, Hammer
.- Sour
.- RETINA and Stirrup .- Contact
.- TASTE NERVE
.- OPTIC NERVE - Eustachian tube .- Pain
INNER EAR:
.- Cochlea
PROCESS .- Semicircular
canals.
.- Auditory nerve Nerve endings Taste buds detect
The light enters in the in the skin different tastes
eye through the detect and send
pupil. The cornea sensations and sensations to the
and lens focus the send them to brain through the
image on the the brain. taste nerve .
retina.The retina
convert it in nerve
signals that send to
The vibrations on the air enter through the auditory canal. They make
the brain through the vibrate the eardrum, that transmit these vibrations to the Anvil, Hammer
optic nerve. and Stirrup, and finally to the Cochlea. They are changed into nerve
impulses , and sent to the brain through the Auditory Nerve.

17. UNIT 2: SENSE ORGANS SENSE ORGANS
ORGAN EYES EARS SKIN TONGUE NOSE
Hearing
SENSE SIGHT and TOUCHT TASTE SMELL
balance
MAIN OUTER EAR: .- NERVE
PARTS
.- CORNEA .- TASTE BUDS
.- Auditory Canal ENDINGS
.-PUPIL Detect: .-
.- Eardrum Detect:
.-IRIS .- Salty Called
MIDDLE EAR:
.- LENS .- Cold .- Sweet ( )
.-Aud. Osicles:
.- Heat .- Bitter .-
.- VITREOUS HUMOR Anvil, Hammer
.- Sour
.- RETINA and Stirrup .- Contact
.- TASTE NERVE
.- OPTIC NERVE - Eustachian tube .- Pain
INNER EAR:
.- Cochlea
PROCESS .- Semicircular
canals.
.- Auditory nerve Nerve endings Taste buds detect
The light enters in the in the skin different tastes
eye through the detect and send
pupil. The cornea sensations and sensations to the
and lens focus the send them to brain through the
image on the the brain. taste nerve .
retina.The retina
convert it in nerve
signals that send to
The vibrations on the air enter through the auditory canal. They make
the brain through the vibrate the eardrum, that transmit these vibrations to the Anvil, Hammer
optic nerve. and Stirrup, and finally to the Cochlea. They are changed into nerve
impulses , and sent to the brain through the Auditory Nerve.

18. UNIT 2: SENSE ORGANS SENSE ORGANS
ORGAN EYES EARS SKIN TONGUE NOSE
Hearing
SENSE SIGHT and TOUCHT TASTE SMELL
balance
MAIN OUTER EAR: .- NERVE
PARTS
.- CORNEA .- TASTE BUDS
.- Auditory Canal ENDINGS
.-PUPIL Detect: .- Olfatory BULB
.- Eardrum Detect:
.-IRIS .- Salty Called
MIDDLE EAR:
.- LENS .- Cold .- Sweet (PITUITARY)
.-Aud. Osicles:
.- Heat .- Bitter .- Olfatory NERVE
.- VITREOUS HUMOR Anvil, Hammer
.- Sour
.- RETINA and Stirrup .- Contact
.- TASTE NERVE
.- OPTIC NERVE - Eustachian tube .- Pain
INNER EAR:
.- Cochlea
PROCESS .- Semicircular
canals.
.- Auditory nerve Nerve endings Taste buds detect
The light enters in the in the skin different tastes
eye through the detect and send
pupil. The cornea sensations and sensations to the
and lens focus the send them to brain through the
image on the the brain. taste nerve .
retina.The retina
convert it in nerve
signals that send to
The vibrations on the air enter through the auditory canal. They make
the brain through the vibrate the eardrum, that transmit these vibrations to the Anvil, Hammer
optic nerve. and Stirrup, and finally to the Cochlea. They are changed into nerve
impulses , and sent to the brain through the Auditory Nerve.

19. UNIT 2: SENSE ORGANS SENSE ORGANS
ORGAN EYES EARS SKIN TONGUE NOSE
Hearing
SENSE SIGHT and TOUCHT TASTE SMELL
balance
MAIN OUTER EAR: .- NERVE
PARTS
.- CORNEA .- TASTE BUDS
.- Auditory Canal ENDINGS
.-PUPIL Detect: .- Olfatory BULB
.- Eardrum Detect:
.-IRIS .- Salty Called
MIDDLE EAR:
.- LENS .- Cold .- Sweet (PITUITARY)
.-Aud. Osicles:
.- Heat .- Bitter .- Olfatory NERVE
.- VITREOUS HUMOR Anvil, Hammer
.- Sour
.- RETINA and Stirrup .- Contact
.- TASTE NERVE
.- OPTIC NERVE - Eustachian tube .- Pain
INNER EAR:
.- Cochlea
PROCESS .- Semicircular The smell receptors
canals. in the olfatory bulb
.- Auditory nerve Nerve endings Taste buds detect interact with
The light enters in the
in the skin different tastes molecules from
eye through the
detect and send vapors and transmit
pupil. The cornea
sensations and sensations to the sensations to the
and lens focus the
send them to brain through the brain through the
image on the
the brain. taste nerve . olfatory nerve.
retina.The retina
convert it in nerve
signals that send to The vibrations on the air enter through the auditory canal. They make
the brain through the vibrate the eardrum, that transmit these vibrations to the Anvil, Hammer
optic nerve. and Stirrup, and finally to the Cochlea. They are changed into nerve
.
impulses , and sent to the brain through the Auditory Nerve.

20. UNIT 2: SENSE ORGANS SENSE ORGANS
ORGAN
SENSE
MAIN EAR:
PARTS
.- .- .-
.-
.- Detect: Detect: .-
.-
.- .- Called
EAR: .-
.- ( )
.- .-Auditory. .- .- .-
.- Osicles: .- .-
.- . . . , .- .-
.- and . .
.-
EAR:
PROCESS .-
.-
.-
.
.