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Gross Anatomy Exam 4 > Nose > Flashcards

Flashcards in Nose Deck (75):
1

Bony nasal aperture

Rostral opening of the nose

2

Nostrils aka?

Nares

3

Philtrum

Separates nostrils from each other

4

Apex of nose is what type of epidermis?

Thickened cornified epidermis

5

Glands in apex of nose

None in dog

6

Surface of nasal plane is moistened by?

Secretion of lateral nasal gland

7

What is nasal cartilage?

Support of external nose → moveable

8

5 nasal cartilages

1. Septal c. of nose
2. Dorsolateral nasal c.
3. Ventrolateral nasal c.
4. Lateral accessory nasal c.
5. Medial accessory nasal c.

9

Septal c. of nose

Perpendicular medial plate separating most of nasal cavity into right and left nasal fossae

10

Dorsolateral nasal c.

Most expansive c. in mobile part of external nose → joins dorsal part of bony nasal aperture caudally

11

Ventrolateral nasal c.

Continuation of rostral lateral half of septal c. → rostrally runs into apex of nose

12

Lateral accessory nasal c.

Supports nostril ventrally

13

Medial accessory nasal c.

Arises from ventral nasal concha and ventrolateral nasal c. → extends rostrally inside alar fold

14

2 lig. of nose

1. Dorsal nasal lig.
2. Lateral nasal lig.

15

Which lig. of nose is paired?

Lateral nasal lig. (one of each side)

16

Ligs. of nose run from ___ to?

Dorsolateral nasal c. → nasal b. (dorsal or lateral surfaces)

17

Nasal cavity extends from ___ to ?

Nostrils → chonae

18

Parts of nasal cavity

1. Nasal septum
2. Nostril
3. Nasal vestibule
4. Nasal conchae
4. Nasal meatuses

19

3 portions of nasal cavity

1. Osseous portion
2. Rostral and cd. cartilagenous portions
3. Membranous portion

20

Borders of osseous portion of nasal septum

Caudally: ethmoid b.

Dorsally: frontal and nasal b.

Ventrally: vomer b.

21

Which cartilaginous portion of nasal cavity is movable?

Rostral

22

Origin of cd. cartilaginous portion of nasal cavity

Ethmoid b.

23

Nostril is wider ____

Dorsomedialy than ventrollateraly

24

Wing of nostrils contains?

Much of dorsolateral and accessory nasal cc.

25

Most mobile portion of nostril

Wing of nostrils

26

Nasal vestibule is the common opening for the?

1. External nose
2. Nasolacrimal duct
2. Duct of the lateral nasal gland

27

Nasal vestibule houses?

Alar fold

28

What is alar fold?

Rostral extension of ventral nasal concha

29

Nasal conchae

Cartilagenous (or slightly ossified) scrolls covered by nasal mucosa → occupy most of nasal cavity

30

3 nasal conchae

1. Dorsal nasal conhae
2. Ventral nasal conchae
3. Middle (ethmoidal) nasal conchae

31

Dorsal nasal concha originates from?

Ethmoid crest of nasal b.

32

Dorsal nasal concha extends from ? to ?

Cribiform plate → nasal vestibule

33

Dorsal nasal concha is formed by?

First endoturbinate

34

Longest concha in domestic mammals

Dorsal nasal concha

35

Ventral nasal conch originates from?

Conchal crest of maxilla

36

Ventral nasal concha extends from ? to ?

1st premolar tooth → 3rd premolar tooth

37

Ventral nasal concha is arranged in?

Many longitudinal folds which unite rostrally to form alar fold

38

Ethmoidal nasal concha aka?

Middle nasal concha

39

What fills cd. part of nasal cavity?

Ethmoidal (middle) nasal conchae

40

Ethmoid nasal concha is formed by?

Second endotrubinate

41

Ethmoidal nasal choncha is part of?

Ethmoidal labyrinth

42

Endoturbinates fill?

Nasal cavity

43

Ectoturbinates fill?

Frontal sinus

44

Ethmoidal labyinth are outgrowth of?

Ethmoid b. covered with nasal mucosa

45

All ethmoidal labyrinths are attached to?

External lamina and cribiform plate of ethmoid b.

46

The major conchae divide the nasal cavity into what 3 nasal meatuses?

1. Dorsal nasal meatus
2. Middle nasal meatus
3. Ventral nasal meatus

47

Dorsal nasal meatus is the passage between?

Nasal b. (ventral surface) → dorsal nasal concha

48

Dorsal nasal cavity leads directly to?

Fundus of nasal cavity

49

Middle nasal meatus is the passage between?

Dorsal and ventral nasal conchae

50

Middle nasal meatus communicates ith?

Paranasal sinuses

51

Ventral nasal meatus is the passage between?

Ventral nasal conchae → hard palate (dorsal surface)

52

Main pathway for airflow

Ventral nasal meatus

53

Clinical correlation of ventral nasal meatus

1. Nasogastric tube
2. Endoscope

54

Nasogastric tube and endoscope are both pointed?

Medially and ventrally

55

Ventral nasal meatus leads into?

Nasopharyngeal meatus

56

Nasopharyngeal meatus extends between?

Ventral nasal meatus and chonae

57

Which wall of nasopharyngeal meatus is longer?

Lateral > medial

58

Borders of nasopharyngeal meatus

Dorsal: ethmoid b. (transverse lamina)

Lateral: maxilla

Medial: vomer

Ventral: palatine b. (horizontal lamina)

59

Nasopharyngeal meatus leads into?

Nasopharynx

60

What is the common nasal meatus?

Longtidunal space on either side of nasal septum

61

Common nasal meatus communicates with?

All other nasal meatus

62

What are paranasal sinuses?

Air-filled cavities between external and internal lamina of bb. of skull

63

3 paranasal sinuses

1. Frontal sinus
2. Sphenoid sinus
3. Maxilary recess

64

Frontal sinus is located where?

Rostral 2/3 of frontal b.

65

Compartments of frontal sinus

1. Lateral
2. Medial
3. Rostral

66

Largest compartment of frontal sinus

Lateral

67

Smallest compartment of frontal sinus

Medial

68

The 3 components of the paranasal sinuses do/do not communicate with each other

Do not

69

Each compartment of the paranasal sinus opens separately into?

Nasal cavity via space between 2nd and 3rd ectoturbinates

70

Sphenoid sinus

Larger in cat (very small or not present in dog) → contains part of endoturbinate IV

71

What is a recess?

Something with is not an air-filled cavity between external and internal lamina of skull bb.

72

Borders of maxilla

Lateral: maxilla, lacrimal and palatine bb.

Medial: ethmoidal b. (orbital plate)

73

Does size of maxillary recess vary with increasing age of animal?

Does not

74

Nasomaxillary opening is the connection between ? and?

Middle nasal meatus → maxilary recess

75

Nasomaxillary opening is at the level of?

Carnassial tooth