1. The Sensory Systems 7
Lesson 7.1: The Eye Lesson 7.2: The Ear Lesson 7.3: Smell and Taste

2. Chapter 7: The Sensory Systems
Lesson 7.1
The Eye

3. The Eye anatomy of the eye vision
external
internal
vision
injuries, diseases, and disorders of the eye

4. External Structures of the Eye
tarsal glands
ciliary glands
conjunctiva
lacrimal glands

5. Extrinsic Muscles

7. Internal Structures of the Eye
humors
aqueous
vitreous
tissue layers
sclera
cornea
choroid
pupil
iris
retina
rods and cones

8. Internal Structures of the Eye

9. Vision Disorders

10. Internal Structures of the Eye

11. Vision retina impulse optic nerve brain optic chiasma optic tracts
occipital lobe

12. Vision Disorders

13. Vision Disorders

14. Eye Diseases conjunctivitis cataracts glaucoma macular degeneration
also known as pink eye
cataracts
glaucoma
macular degeneration
diabetic retinopathy
vitreous floaters

15. Review and Assessment
Fill in the blanks with: choroid, cornea, cones, or vitreous. 1. The pupil is part of the _______________ tissue layer. 2. The two humors are aqueous and _______________. 3. The retina contains the rods and _______________. 4. The clear part of the sclera is the _______________.

16. Path of light ray through the eyeball.
Light enters through the CORNEA (which also protects the eye)
Light then moves through PUPIL (black circle in center of eye) which helps the light move through the lens.
The IRIS(colored part of the eye), helps the pupil constrict or dilate, depending on the amount of light.
There are two muscles in the iris: SPHINCTER PUPILLAE (contracts with bright light and pupil gets smaller) and DILATOR PUPILLAE (dilates with dim light and pupil gets larger)
The lens focuses light rays on to the back of the eyeball (RETINA). The image falls on the retina upside down and the brain turns it right side up so that you the image correctly.
The impulse leaves the eyeball through the OPTIC NERVE and travels to the OCCIPITAL LOBE where the impulse is interpreted.

17. Chapter 7: The Sensory Systems
Lesson 7.2
The Ear

18. The Ear anatomy of the ear functions of the ear
disorders and infections of the ear

19. Anatomy of the Ear external ear middle ear internal ear
auricle, auditory canal, and tympanic membrane
middle ear
ossicles
hammer, anvil, and stirrup
Eustachian tube
internal ear
cochlea, vestibule, and semicircular canals

20. Anatomy of the Ear

21. Anatomy of the Ear

22. Functions of the Ear
Hearing - Equilibrium – hair cells, cochlear duct semicircular canals

23. Disorders and Infections of the Ear
deafness
tinnitus
external otitis (swimmer’s ear)
otitis media (middle ear infection)
labyrinthitis (inner ear infection)

24. Review and Assessment
True or False? 1. External otitis is swimmer’s ear. 2. The ossicles are in the external ear. 3. Hair cells are responsible for equilibrium. 4. The cochlea is part of the inner ear. 5. Labyrinthitis is an inner ear infection.

25. Chapter 7: The Sensory Systems
Lesson 7.3
Smell and Taste

26. Smell and Taste olfactory sense (sense of smell)
injuries and disease of the nose
gustatory sense (sense of taste)
disorders of the tongue

27. Olfactory Sense olfactory region olfactory receptor cells
olfactory hairs
olfactory filaments
olfactory nerve
olfactory bulb

28. Olfactory Sense

29. Injuries and Disorders of the Nose
rhinitis
inflammation of nasal membrane
septum problems
deviated septum

30. Gustatory Sense taste buds papillae gustatory cells gustatory hairs
taste pores
tastants

31. Disorders of the Tongue
infection
severely bitten tongue during a traumatic accident
tongue piercing
injury
abnormal growth
hairy tongue
burning mouth syndrome

32. Review and Assessment
Match these words with 1–4 below: gustatory, gustatory hairs, olfactory hairs, rhinitis. 1. inflammation of the nasal membrane 2. sense of taste 3. part of taste bud 4. part of sense of smell