Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
23 Cards in this Set
- Front
- Back
- 3rd side (hint)
_________ gland is the first endocrine gland to develop in the embryo
|
thyroid
It begins to form about __ days after fertilization |
24
|
|
thyroid
begins to form about __ days after fertilization |
24
|
|
|
The thyroid gland
begins to form from a median x_____________ thickening in the floor of the primordial ____________ |
endodermal
pharynx On which day after fertilization = |
24
|
|
As the embryo and tongue grow, the developing thyroid gland descends in =
the thyroid gland is connected to the tongue by a narrow tube, the ________ _______ |
thyroglossal duct.
|
|
|
The proximal opening of the thyroglossal duct persists as a small pit in the tongue - the foramen =
|
cecum
|
|
|
Nm the
Thyroid structures 4ct |
R/L Lobe
Isthmus Pyramidal Lobe |
|
|
A pyramidal lobe extends superiorly from the isthmus in about __% of people
|
50%
|
|
|
Clinical Considerations
For Thyroid Dysfctn = 3ct |
Congenital hypothyroidism
Thyroglossal Duct Cysts & Sinuses Ectopic Thyroid Tissue |
|
|
Development of Tongue
2 major portions are = |
Root (Posterior 1/3)
Body (anterior 2/3rd) |
|
|
Tongue development starts by the end of __ week =
|
4th
Three lingual buds develop from the mesenchyme of ___ _____ ___ just rostral to the ____ _______ |
foramen cecum
1st P.A One median tongue bud ( tuberculum impar) Two lateral (distal) tongue buds |
|
The merged distal tongue buds form what portion =
|
anterior two-thirds
|
|
|
Fusion of the distal tongue buds is indicated by a middle groove, the
|
median sulcus of the tongue.
|
|
|
Formation of the posterior third (pharyngeal part) of the tongue
|
copula
hypopharyngeal eminence |
|
|
copula
rises from __pair of _____ ______ Fuses _______ Parts |
the 2nd pair of pharyngeal arches
ventromedial |
|
|
hypopharyngeal eminence
(hypobranchial eminence) rises from __ & __ pairs of _____ = |
3rd
4th pairs of arches |
|
|
Taste buds develop during weeks
__ to __ |
11-13
by interaction between |
epithelial cells of the tongue and invading gustatory nerve cells (sensory nerves for the sense of taste)
from the chorda tympani, glossopharyngeal, and vagus nerve. |
|
Taste Bud Sections
Posterior = Mid Post = Mid Anterior = Anterior = |
Bitter
Sour Salty Sweet |
|
|
mucosa Nerve supply of Tongue
anterior two-thirds = taste buds in the anterior two-thirds = |
trigeminal V
facial nerve its chorda tympani branch except for the vallate papillae |
|
|
The vallate papillae in the oral part of the tongue are innervated by the
|
glossopharyngeal IX
|
|
|
posterior third of the tongue (pharyngeal part)
of the third pharyngeal arch innervated by = |
glossopharyngeal IX
|
|
|
All muscles of the tongue are supplied by the =
|
hypoglossal
XII except for the ___________N. which is supplied by the _______ |
palatoglossus
vagus X |
|
Term for taste =
|
Gustatory
|
|
|
Gustatory means =
|
Term for taste
|
|