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33 Cards in this Set
- Front
- Back
In this image what are the 5 processes? |
Frontonasal process 2 Maxillary processes 2 Mandibular processes |
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__ migrate into the pharyngeal arches and become __ These cells come from? - They form bones, cartilage, bone,dentin, tendon, dermis, meninges, periodontalligament,sensoryneurons and glandular stroma |
Neural crest cell, become mesenchyme in those arches Midbrain/Hindbrain |
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By week 5, the face has 5 facial prominences plus? These are __ induced by the ventral forebrain |
2 Nasal Placodes - open up into the nose Ectoderm |
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Nasal placodes invaginate and forms? What are the 2 new prominences that appear? |
Nasal pits Lateral nasal prominence and medial nasal prominence on the sides of the nasal pit |
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Over the next 2 weeks, what increases in size and grows toward the midline? |
Maxillary process and medial nasal process |
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As the maxillary and nasal processes grow, they become separated by? |
Bucconasal groove and naso-optic groove (nasolacrimal groove -won't be asked) |
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What fuses in the midline? |
- 2 medial nasal prominences |
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What fuses with the medial nasal processes? In the upper lip, where does the philtrum come from? Where does the lateral part of the upper lip come from? |
Maxillary processes The medial nasal prominences The maxillary prominences |
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What forms the lower lip? |
Mandibular prominences when they merge in the midline |
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What 3 things develop from the maxillary prominences? |
Cheeks, bones of cheek = maxilla, maxillary alveolar bone |
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The bridge of the nose is formed from? The crest and tip of the nose is formed from? The alae of the nose is formed from? |
Frontal prominence Medial nasal prominences Latera nasal prominences |
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Failure of fusion of the maxillary prominence and medial nasal prominence can result in a? Failure of fusion of the 2 medial nasal prominences result in? |
Bilateral cleft lip Median cleft lip |
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The Intermaxillary segment is the 2 fused __ **What does it form? The maxillary process grows to the midline and eventually fuses with the? Maxillary process give off what tooth structures? |
2 fused medial nasal prominences Philtrum of the upper lip (labial component) 4 incisor teeth (upper jaw component) -other max. teeth come from max. process Primary palate (palatal component) -which fuses with the nasal septum from the frontal prominence Nasomedial process Palatine shelf |
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When the maxillary process migrate toward the nasal process (intermaxillary segment) to fuse they form the? In the midline the maxillary processes develop palatine shelves which fuse forming the? Failure of fusion between the intermaxillary segment and maxillary process can result in? Failure of fusion between the palatine shelves result in? |
Anterior part of the palate (primary palate) Posterior part of the palate (secondary palate) Cleft lip, cleft jaw, or cleft palate Cleft palate (note its possible to have just a a cleft palate without a cleft jaw or lip because these fuse 2nd) |
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Initially the palatine shelves grow downward where?
Eventually it fuses in the midline and fuses with the? |
– on either side of the tongue - Fuses with the nasal septum (which has already fused with the intermaxillary segment |
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Development of the palate is the fusion of the palatine shelves and the palatine shelves with the intermaxillary segment The junction of the 2 fusions is called the? |
Incisive Foramen |
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What is circled? At the arrows what can be seen along the fusion line? |
Intermaxillary segment Epithelial tissue |
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Where does the tongue develop? |
Where the stomadeum and pharynx meet at the oral plate |
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What develops from the 1st arch (what 2 regions)? What develops at the level of the 2nd, 3rd, and 4th arches? What develops at the level of just the 4th arch? |
Lingual swellings (laterally) Tuberculum impar (in the midline) Hypobranchial eminence (copula) epiglottal swellings |
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What gives rise to the mucosa of the anterior 2/3 of the tongue? This is innervated by? |
Lateral swellings of the 1st arch Cranial nerve 5 (trigeminal nerve) - for pain and sensory function |
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What gives rise to the posterior 1/3 or the tongue? This is innervated by? The most posterior part of the tongue and the epiglottis is derived from? This is innervated by? *Which arch doesn't contribute much to the tongue? |
Hypobranchial eminence mostly from the 3rd arch Cranial nerve 9 (glossal pharyngeal nerve) - for gag reflex The 4th arch Cranial nerve 10 (vagus nerve) 2nd arch |
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Myoblasts from __ give rise to most of the tongue muscles and are innervated by? |
Occipital somites (Not pharyngeal arches!) and are innervated by the Cranial nerve 12 (hypoglossal nerve) |
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As nasal pits invaginate, the nasal cavity is separated from the oral cavity by the oronasal membrane which breaks down and forms the primitive chona Once palate forms, there is the definitive choanae where air can go from __ into the __ |
nasocavity into the nasopharynx |
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Rathke's pouch is the invagination of the ectoderm and forms? Infundibulum is the diverticulum from the forebrain and forms? |
Pars intermedia, pars distalis, and pars tuberalis Infundibular stalk and pars nervosa |
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**Skeleton of the 1st arch forms? |
-Maxillary and mandibular bones - Meckel's cartilage: malleus, incus, and sphenomandibular ligament |
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Bones in tan develop from? |
Neural crest |
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*In the development of the mandible, Meckel's cartilage does not give rise to the mandible but its important because? |
Mandibular branch of the trigemminal nerve (including lingual, incisive, and mental branch) all branch around Meckel's cartilage -landmark at which the nerves travel |
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In the second arch, the endoderm of the pouch forms? Skeleton of the second arch mesenchyme forms? |
Platine tonsil in tonsillar fossa Stapes |
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In the third arch, the endoderm of the pouches form? |
Inferior parathyroid and thymus |
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In the fourth arch, the endoderm of the pouches form the? |
Superior parathyroids Ultimobranchial body - gives rise to parafollicular cells |
