Block 2 Flashcards
What is the boarder called between lip tissue and facial tissue?
Vermillion boarder
What is the corner of the mouth/lips called?
Labial Commissure
Name the 5 main prominences of facial development
White = frontonasal prominence
Green = median nasal prominence
Purple = lateral nasal prominence
Gold = maxillary prominence
Brown = mandibular prominence
Describe the progression of the nasal cavity
Nasal prominence, Nasal pit (Ectodermal invagination) Nasal sac (Ectoderm)
Describe the progression of the oral cavity
Stomatodeum
The __________degrades between the oral and nasal cavities
Oronassal Membrane
The sinuses are formed from outgrowths of nasal cavity called ________
Diverticulations
Name the 4 sinuses
Ethmoid Frontal Sphenoid Maxillary
When do the sinuses develop?
Certain sinuses develop late in fetal period others take years to develop
What are the purposes of the sinuses?
Humidifies air Speech Lightens Cranium while maintaining strength
The nasal cavity is lined with a respiratory mucosa. Name the layers of cells which are above the basement membrane.
Cillia Pseudostratified columnar epithelium Goblet cells
What type of tissue is found below the basement membrane? What is it’s purpose?
Connective tissue - Lamina Propria Warms the air
How are the Paranasal sinuses different than the typical nasal mucousa?
Thinner than the nasal mucosa with fewer goblet cells
Name the cartilage of the first branchial arch associated with the formation of the mandible
Meckel’s cartilage
The two cartilages (of Meckel’s cartilage) do not meet at the midline but are separated by a thin line of cartilage called the ____
Symphysis
Describe the bone formation that follows the presence of Meckel’s cartilage
Mesenchyme cells congregate at the symphysis, intramembranous ossification is triggered and begins bone creation
Most of Meckel’s cartilage is reabsorbed entirely but a portion may be left in the _____ and ______
posterior extremity – malleolus of the inner ear; the sphenomandibular ligament
The primary palate formation comes from the joining of the medial ______. This joining creates the ________.
nasal prominences intermaxillary segment
Only after the development of the ________can oral and nasal cavities by distinguished.
secondary palate
True or False The secondary palate contains the hard and soft palate
True
The secondary palate is made from which three features?
2 palentine shelves Nasal septum
Name the 4 steps in the completion of the palate
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
Describe the anatomical location of the primary palate
From Incisive foreman (small dark hole) to distal lateral incisors
Describe the anatomical location of the secondary palate
Incisive foreman to Uvula Includes Maxilla, Palatine bones, Soft Palate, and Uvula
What is the result of processes failing to fuse?
Cleft lip/palate
The tongue is derived from which arches?
The 1, 2 and 3.
However, Arch 2 is eventually overgrown by arch 3
The anterior 2/3 of the tongue is ____derm and the posterior 1/3 is _____derm
Ectoderm Endoderm
What is the anterior portion of the tongue derived from?
Lateral lingual swellings and the tuberculum impar
What is the posterior portion of the tongue derived from?
Copula
The tongue muscle is formed from _____
occipital somites which migrate into the tongue area
A hairy tongue is the result of ________. It is treated with __________.
an accumulation of bacterial growth proper oral hygiene
