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Health: Unit 3 > 11. Teeth, Mouth, Eyes, And Ears > Flashcards

11. Teeth, Mouth, Eyes, And Ears Flashcards

1
Q

Malady

A

Illness or disorder of the body

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2
Q

3 parts of tooth:?

A

Crown, neck, root

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3
Q

Crown

A

Top part of tooth that rises above gum; covered by enamel

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4
Q

Enamel

A

Hardest substance in body

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5
Q

Neck

A

Connect crown and root

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6
Q

Root

A

Stabilizes tooth; covered by cementum

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7
Q

Cementum

A

Bone-like substance

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8
Q

___ hold onto cementum, fixing tooth firmly into jaw

A

Periodontal ligament

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9
Q

Inside the other is a layer of?

A

Dentin

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10
Q

Underneath dentin are blood vessels and nerves?

A

Pulp

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11
Q

Blood vessels supply tooth with?

A

Nutrients

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12
Q

Nerves

A

Help you sense activity on tooth surface; feel movement of tongue; helps you to talk

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13
Q

Most obvious sign of poor oral hygiene?

A

Cavities

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14
Q

Tooth decay

A

When plaque sits on surface of tooth

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15
Q

Plaque

A

Film-like substance formed from acid resulting from combination of food sugars and bacteria

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16
Q

Acid-like plaque eats away at surface of ____?

A

Crown; eventually reaching the pulp

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17
Q

Cause of periodontal disease?

A

Plaque

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18
Q

Periodontal disease destroys ___ that surrounds teeth and can cause?

A

Gums and ligaments; tooth loss

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19
Q

First sign of periodontal disease?

A

Inflation of gums

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20
Q

Halitosis

A

Medical term for bad breath

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21
Q

Outer part of eye consists of:?

A

The sclera, the cornea, the iris, and the pupil

22
Q

Sclera

A

White outer part of eye

23
Q

Cornea

A

Clear outer layer that functions as a lens

24
Q

Iris

A

Colored part of eye

25
Q

Pupil

A

Opening in center of iris

26
Q

Pupil is controlled by ___ muscles of the ___ in its efforts to protect the eyes from ____

A

Involuntary; iris; light

27
Q

Inside the eyeball:?

A

Crystalline lens, collars body, and the retina

28
Q

Crystalline

A

Works with cornea to focus on an image

29
Q

Ciliary body

A

Collection of muscles that enables lens to focus

30
Q

Retina

A

Nerve tissue at back of eye; receives image that has been formed by cornea, pupil, and crystalline lens

31
Q

Retina

A

Converts image into electrochemical signals and transmits them to brain

32
Q

Eyeball rests in socket in?

A

Skull-orbit

33
Q

Orbit

A

Line with fat that cushions eyeball

34
Q

___ muscles control eye movement:?

A

6

35
Q

Conjunctiva

A

Inner lining of eyelids, which contains glands that secrete oils and tears

36
Q

Vitamin for eyes?

A

Vitamin A

37
Q

Sunglasses protect the ____ from damage, which could lead to partial blindness

A

Retina

38
Q

New and farsightedness is caused by?

A

Shape of eye; distance from cornea to retina

39
Q

Outer ear consist of:?

A

Pinna and ear canal

40
Q

Pinna

A

Made up skin and cartilage; receives sound waves

41
Q

Ear canal

A

Channels sound captured by pinna to eardrum; 1 inch long

42
Q

Ear canal is lined with tiny hairs that?

A

Protect middle ear and inner ear

43
Q

___ separates outer ear from middle ear

A

Eardrum

44
Q

Eardrum

A

Thin membrane that is sensitive to air pressure caused by sound

45
Q

When the eardrum vibrates, it moves a set of muscles called?

A

Ossicles

46
Q

Ossicles

A

Hammer, anvil, and stirrup; transmit sound waves from eardrum to inner ear

47
Q

Inner ear

A

Most complex structure of ear; consist of cochlea and semicircular canals

48
Q

Cochlea

A

Receives transfer of sound waves from ossicles and converts them into electrochemical impulses which are sent to brain

49
Q

The cochlea is shaped like ____ and is lined with?

A

Snail; hair cells

50
Q

Semicircle canals

A

Balance; contains fluid and hair cells that interpret changes in body’s position

Health: Unit 3 (5 decks)

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