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22 Cards in this Set
- Front
- Back
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Germ layer derivative of ectoderm
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Epithelilal lining of external auditory meatus
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Germ layer derivative of Neuroectoderm (neural crest)
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Bones, cartilage and ligaments derived from pharyngeal arches
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Germ layer derivative of Mesoderm (paraxial)
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Muscles derived from pharyngeal arches
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Germ layer derivative of Endoderm
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Pharyngeal pouch derivatives
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Germ layer derivative of endoderm, mesoderm and ectoderm
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Typanic membrane.
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Pharyngeal Pouch 1 derivative
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Auditory (Eustachian) tube and middle ear cavity
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Pharyngeal Pouch 2 derivative
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Crypts of palantine tonsils
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Pharyngeal Pouch 3 derivative
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Dorsal portion: inferior parathyroid
Ventral portion: thymus |
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Pharyngeal Pouch 4 derivative
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Dorsal portion: superior parathyroid
Ventral portion: Parafollicular (C) cells of thyroid |
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Pharyngeal Pouch 5 derivative
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Parafollicular (C) cells of thyroid
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Which bones of the skeleton arise from Pharyngeal Arch 1?
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Malleus
Incus Anterior ligament of malleus Sphenomandibular ligament |
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Which bones of the skeleton arise from Pharyngeal Arch 2?
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Stapes
Styloid process Stylohyoid ligament Lesser horn Superior body of hyoid |
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Which bones of the skeleton arise from Pharyngeal Arch 3?
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Greater horn
Inferior body of hyoid |
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Which bones of the skeleton arise from Pharyngeal Arch 4 and 6?
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Laryngeal cartilages, ie:
- Thyroid - Cricoid - Artenoid - Triticeal - Corniculate - Cuneform |
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What muscles arise from pharyngeal arch 1?
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Muscles of mastication
- Mylohyoid - Anterior digastric - Tensor veli palatini - Tensor tympani |
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What muscles arise from pharyngeal arch 2?
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Muscles of facial expression
- Stylohyoid - Posterior digastric - Stapedius |
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What muscles arise from pharyngeal arch 3?
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- Stylopharyngeus
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What muscles arise from pharyngeal arch 4 and 6?
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- Laryngeal muscles
- Levator veli palatini - Muscularis uvalae - Cricothyroid (4th arch only) Intrinsic layngeal muscles - Cricopharyngeus (6th arch) |
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What nerve is derived from pharyngeal arch 1?
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Maxillary and mandibular divisions of trigeminal nerve (CN V)
**note**V1 does not come from this embryologic divison |
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What nerve is derived from pharyngeal arch 2?
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Facial Nerve (CN VII)
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What nerve is derived from pharyngeal arch 3?
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Glossopharyngeal nerve (CN IX)
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What nerve is derived from pharyngeal arch 4 and 6?
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Superior laryngeal (4th arch)
Recurrent laryngeal (6th arch) Both are branches of Vagus nerve (CN X) |
