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