Md1 Embryology Block 3 Pharangeal Arches Part C Thyroid

Front 1

_________ gland is the first endocrine gland to develop in the embryo

Back 1

thyroid

It begins to form about __ days after fertilization

Hint 1

24

Front 2

thyroid
begins to form about __ days after fertilization

Back 2

24

Front 3

The thyroid gland
begins to form
from a median x_____________
thickening in the floor of the primordial ____________

Back 3

endodermal

pharynx

On which day after fertilization =

Hint 3

24

Front 4

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
________ _______

Back 4

thyroglossal duct.

Front 5

The proximal opening of the thyroglossal duct persists as a small pit in the tongue - the foramen =

Back 5

cecum

Front 6

Nm the
Thyroid structures 4ct

Back 6

R/L Lobe
Isthmus
Pyramidal Lobe

Front 7

A pyramidal lobe extends superiorly from the isthmus in about __% of people

Back 7

50%

Front 8

Clinical Considerations
For Thyroid Dysfctn =
3ct

Back 8

Congenital hypothyroidism
Thyroglossal Duct Cysts & Sinuses
Ectopic Thyroid Tissue

Front 9

Development of Tongue
2 major portions are =

Back 9

Root (Posterior 1/3)

Body (anterior 2/3rd)

Front 10

Tongue development starts by the end of __ week =

Back 10

4th

Three lingual buds develop from the mesenchyme of ___ _____ ___ just rostral to the ____ _______

Hint 10

foramen cecum

1st P.A

One median tongue bud ( tuberculum impar)
Two lateral (distal) tongue buds

Front 11

The merged distal tongue buds form what portion =

Back 11

anterior two-thirds

Front 12

Fusion of the distal tongue buds is indicated by a middle groove, the

Back 12

median sulcus of the tongue.

Front 13

Formation of the posterior third (pharyngeal part) of the tongue

Back 13

copula
hypopharyngeal eminence

Front 14

copula
rises from __pair of _____ ______

Fuses _______ Parts

Back 14

the 2nd pair of pharyngeal arches

ventromedial

Front 15

hypopharyngeal eminence
(hypobranchial eminence)

rises from __ & __ pairs of _____ =

Back 15

3rd
4th
pairs of arches

Front 16

Taste buds develop during weeks
__ to __

Back 16

11-13

by interaction between

Hint 16

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.

Front 17

Taste Bud Sections

Posterior =
Mid Post =
Mid Anterior =
Anterior =

Back 17

Bitter
Sour
Salty
Sweet

Front 18

mucosa Nerve supply of Tongue

anterior two-thirds =

taste buds in the anterior two-thirds =

Back 18

trigeminal V

facial nerve
its chorda tympani branch
except for the vallate papillae

Front 19

The vallate papillae in the oral part of the tongue are innervated by the

Back 19

glossopharyngeal IX

Front 20

posterior third of the tongue (pharyngeal part)
of the third pharyngeal arch
innervated by =

Back 20

glossopharyngeal IX

Front 21

All muscles of the tongue are supplied by the =

Back 21

hypoglossal
XII

except for the ___________N.
which is supplied by the _______

Hint 21

palatoglossus

vagus X

Front 22

Term for taste =

Back 22

Gustatory

Front 23

Gustatory means =

Back 23

Term for taste