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Oral and Nasal Cavity Development > Block 2 > Flashcards

Flashcards in Block 2 Deck (31)
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1
Q

What is the boarder called between lip tissue and facial tissue?

A

Vermillion boarder

2
Q

What is the corner of the mouth/lips called?

A

Labial Commissure

3
Q

Name the 5 main prominences of facial development

A

White = frontonasal prominence

Green = median nasal prominence

Purple = lateral nasal prominence

Gold = maxillary prominence

Brown = mandibular prominence

4
Q

Describe the progression of the nasal cavity

A

Nasal prominence, Nasal pit (Ectodermal invagination) Nasal sac (Ectoderm)

5
Q

Describe the progression of the oral cavity

A

Stomatodeum

6
Q

The __________degrades between the oral and nasal cavities

A

Oronassal Membrane

7
Q

The sinuses are formed from outgrowths of nasal cavity called ________

A

Diverticulations

8
Q

Name the 4 sinuses

A

Ethmoid Frontal Sphenoid Maxillary

9
Q

When do the sinuses develop?

A

Certain sinuses develop late in fetal period others take years to develop

10
Q

What are the purposes of the sinuses?

A

Humidifies air Speech Lightens Cranium while maintaining strength

11
Q

The nasal cavity is lined with a respiratory mucosa. Name the layers of cells which are above the basement membrane.

A

Cillia Pseudostratified columnar epithelium Goblet cells

12
Q

What type of tissue is found below the basement membrane? What is it’s purpose?

A

Connective tissue - Lamina Propria Warms the air

13
Q

How are the Paranasal sinuses different than the typical nasal mucousa?

A

Thinner than the nasal mucosa with fewer goblet cells

14
Q

Name the cartilage of the first branchial arch associated with the formation of the mandible

A

Meckel’s cartilage

15
Q

The two cartilages (of Meckel’s cartilage) do not meet at the midline but are separated by a thin line of cartilage called the ____

A

Symphysis

16
Q

Describe the bone formation that follows the presence of Meckel’s cartilage

A

Mesenchyme cells congregate at the symphysis, intramembranous ossification is triggered and begins bone creation

17
Q

Most of Meckel’s cartilage is reabsorbed entirely but a portion may be left in the _____ and ______

A

posterior extremity – malleolus of the inner ear; the sphenomandibular ligament

18
Q

The primary palate formation comes from the joining of the medial ______. This joining creates the ________.

A

nasal prominences intermaxillary segment

19
Q

Only after the development of the ________can oral and nasal cavities by distinguished.

A

secondary palate

20
Q

True or False The secondary palate contains the hard and soft palate

A

True

21
Q

The secondary palate is made from which three features?

A

2 palentine shelves Nasal septum

22
Q

Name the 4 steps in the completion of the palate

A

Lateral Palatal Shelves & Nasal Septum form Ventrally (Downward) Posterior part of primary plate meets the secondary palate and gradually fuse Mandibular growth releases Tongue Nasal Septum and Shelves fuse by 12th week

23
Q

Describe the anatomical location of the primary palate

A

From Incisive foreman (small dark hole) to distal lateral incisors

24
Q

Describe the anatomical location of the secondary palate

A

Incisive foreman to Uvula Includes Maxilla, Palatine bones, Soft Palate, and Uvula

25
Q

What is the result of processes failing to fuse?

A

Cleft lip/palate

26
Q

The tongue is derived from which arches?

A

The 1, 2 and 3.

However, Arch 2 is eventually overgrown by arch 3

27
Q

The anterior 2/3 of the tongue is ____derm and the posterior 1/3 is _____derm

A

Ectoderm Endoderm

28
Q

What is the anterior portion of the tongue derived from?

A

Lateral lingual swellings and the tuberculum impar

29
Q

What is the posterior portion of the tongue derived from?

A

Copula

30
Q

The tongue muscle is formed from _____

A

occipital somites which migrate into the tongue area

31
Q

A hairy tongue is the result of ________. It is treated with __________.

A

an accumulation of bacterial growth proper oral hygiene