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18 Cards in this Set
- Front
- Back
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List the 5 primordia that the face will develop from.
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Paired mandibular prominences; paired maxillary prominences and a single frontonasal prominence.
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How is the upper lip formed?
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Merging of the maxillary prominences with the medial nasal prominences
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What do the lateral nasal prominences form?
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The alae or sides of the nose.
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Merging of the medial nasal prominences forms?
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An intermaxillary segment
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List the 3 parts of the intermaxillary segment.
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labial component (forming the philtrum of the upper lip); maxillary component (associated with the 4 upper incisor teeth); and a palatal component (the primary palate)
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What do the mandibular prominences form?
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Fuse medially to form the lower lip, chin and mandible
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The nasal cavity forms from ectodermal thickenings referred to as?
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Nasal placodes
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The nasal cavity forms by this phenomenon.
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The nasal placodes recede into nasal pits which further deepen into deep nasal sacs
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What structure separates the nasal and oral cavities posteriorly.
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Oronasal membrane
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The palate is composed of two parts what are they? What does each part arise from?
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Anterior part – median palatine process; posterior part – lateral palatine processes
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What forms the primary palate; the secondary palate?
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The primary palate arise from the median palatine process while the secondary palate develops from the 2 lateral palatine processes
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What does the incisive foramen represent?
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The division between the two parts of the palate – primary and secondary.
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List the two parts of the formed tongue.
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Anterior 2/3 (oral part) and posterior 1/3 (pharyngeal part)
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What does the anterior 2/3rd aris from?
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Two lateral lingual swellings (distal tongue buds) and the median tongue bud (tuberculum impar).
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What separates the two halves of the anterior 2/3rds? the anterior 2/3 from the posterior 1/3?
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Median sulcus, terminal sulcus
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From what 2 structures does the posterior 1/3 of the tongue develop?
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The copula and the hypobranchial eminence
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From where does the hypobranchial eminence arise?
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The 2nd, 3rd and 4th pharyngeal arches
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What does the foramen cecum represent?
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The opening of the thyroglossal duct – th site of the invagination of the thyroid gland from the tongue surface.
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