THE BRANCHIAL APPARATUS AND DEVELOPMENT OF THE TONGUE

Question 1

PHARYNGEAL (BRANCHIAL) STRUCTURES

Answer 1

Question 2

GERMINAL LAYER DERIVATIVES

→ ECTODERM contributing to the formation of the face appears by ____ (week?)

Answer 2

the 4th week.

Question 3

GERMINAL LAYER DERIVATIVES

The oropharyngeal membrane (interface between ___ and _____)

Answer 3

ECTODERM and ENDODERM

Question 4

GERMINAL LAYER DERIVATIVES

The oropharyngeal membrane (interface between ECTODERM and ENDODERM)

→ is located in front of ____. Ectodermal structures limiting the stomodeum participatein the formation of the face, as well as of the nasal and oral cavities.

Answer 4

the later palatine tonsils

Question 5

GERMINAL LAYER DERIVATIVES

The oropharyngeal membrane (interface between ECTODERM and ENDODERM)

→ is located in front of the later palatine tonsils

→ Ectodermal structures limiting the ____ participate in the formation of the face, as well as of the nasal and oral cavities.

Answer 5

stomodeum

Question 6

GERMINAL LAYER DERIVATIVES

The oropharyngeal membrane (interface between ECTODERM and ENDODERM)

→ is located in front of the later palatine tonsils

→ Ectodermal structures limiting the stomodeum participate in ____ (3)

Answer 6

the formation of the face, nasal and oral cavities.

Question 7

GERMINAL LAYER DERIVATIVES

What is ECTOMESENCHYME?

Answer 7

MESENCHYME that fills the pharyngeal arches derivesfrom the neural crest

Question 8

PRIMORDIAL TERMS

____ form on either side of the foregut and correspond to the primitive vertebral gill bars orbranchial arches.

Answer 8

The pharyngeal arches

Question 9

PRIMORDIAL TERMS

The pharyngeal arches form on either side of _____ and correspond to the primitive vertebral gill bars or branchial arches.

Answer 9

the foregut

Question 10

PRIMORDIAL TERMS

The pharyngeal arches form on either side of the foregut and correspond to ____

Answer 10

the primitive vertebral gill bars or branchial arches.

Question 11

PRIMORDIAL TERMS

A pharyngeal arch consists of ___ (3)

Answer 11

1. core of mesenchyme
2. external ectoderm
3. internal endoderm.

Question 12

PRIMORDIAL TERMS

The arches are separated

• externally by ____
• internally by ___

Answer 12

• a pharyngeal cleft
• a pharyngeal pouch.

Question 13

• *PHARYNGEAL CLEFTS**
• *FORMATION OF THE EXTERNAL FEATURES**

IDENTIFY

Answer 13

Question 14

PHARYNGEAL CLEFTS
What are the external features formed?

Answer 14

1. External acoustic meatus
2. Tympaninc membrane (outer surface)
3. Neck between the mandible & clavicle

Question 15

BRANCHIAL ARCH CARTILAGES

Identify name of arches

Answer 15

Question 16

3 structures formed from 1st (mandibular) arch

Answer 16

1. Incus
2. Malleus
3. Sphenomandibular lig.

Question 17

4 structures formed from 2nd (hyoid) arch

Answer 17

4. Upper half of hyoid
5. Stylohyoid ligament
6. Styloid process
7. Stapes

Question 18

2 structures formed from third arch

Answer 18

5. Lower half of hyoid
6. Greater cornu of hyoid

Question 19

structures formed from sixth arch

Answer 19

Laryngeal cartilages

6. Thyroid cartilage
7. Cricoid cartilage

Question 20

MUSCLES OF THE BRANCHIAL ARCHES TOGETHER WITH INNERVATION

Identify arches with nerves

Answer 20

Question 21

Identify

Answer 21

Question 22

identify

Answer 22

Question 23

Which structures (expect cartilages) developing from 1st pharyngeal pouch?

Answer 23

• Muscles of mastication
• Mucous membrane (anterior ⅔ of tongue)
• Maxillary artery

Question 24

Which structures (expect cartilages) developing from 2nd pharyngeal pouch?

Answer 24

• Smiling muscles (CN VII)

Question 25

Which structures (expect cartilages) developing from 3rd pharyngeal pouch?

Answer 25

• stylopharyngeus m
• Glossopharyngeus m.