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| Third pharyngeal pouch, dorsal: |
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| inferior parathyroid gland |
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| • | Closely
associated with |
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| thymus
primordium. |
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| • | Detach
together from |
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| pharyngeal
wall and travel |
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| together;
parathyroid bud |
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| encased
in thymic tissue. |
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| • | When
primordia pass thyroid |
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| by 7th
week, primordia |
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| separate:
inf. parathyroid |
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| becomes
located on infero- |
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| posterior
surface of thyroid. |
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