THE BRANCHIAL APPARATUS AND DEVELOPMENT OF THE TONGUE Flashcards
PHARYNGEAL (BRANCHIAL) STRUCTURES
GERMINAL LAYER DERIVATIVES
→ ECTODERM contributing to the formation of the face appears by ____ (week?)
the 4th week.
GERMINAL LAYER DERIVATIVES
The oropharyngeal membrane (interface between ___ and _____)
ECTODERM and ENDODERM
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.
the later palatine tonsils
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.
stomodeum
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)
the formation of the face, nasal and oral cavities.
GERMINAL LAYER DERIVATIVES
What is ECTOMESENCHYME?
MESENCHYME that fills the pharyngeal arches derivesfrom the neural crest
PRIMORDIAL TERMS
____ form on either side of the foregut and correspond to the primitive vertebral gill bars orbranchial arches.
The pharyngeal arches
PRIMORDIAL TERMS
The pharyngeal arches form on either side of _____ and correspond to the primitive vertebral gill bars or branchial arches.
the foregut
PRIMORDIAL TERMS
The pharyngeal arches form on either side of the foregut and correspond to ____
the primitive vertebral gill bars or branchial arches.
PRIMORDIAL TERMS
A pharyngeal arch consists of ___ (3)
- core of mesenchyme
- external ectoderm
- internal endoderm.
PRIMORDIAL TERMS
The arches are separated
- externally by ____
- internally by ___
- a pharyngeal cleft
- a pharyngeal pouch.
- *PHARYNGEAL CLEFTS**
- *FORMATION OF THE EXTERNAL FEATURES**
IDENTIFY
PHARYNGEAL CLEFTS
What are the external features formed?
- External acoustic meatus
- Tympaninc membrane (outer surface)
- Neck between the mandible & clavicle
BRANCHIAL ARCH CARTILAGES
Identify name of arches
3 structures formed from 1st (mandibular) arch
- Incus
- Malleus
- Sphenomandibular lig.
4 structures formed from 2nd (hyoid) arch
- Upper half of hyoid
- Stylohyoid ligament
- Styloid process
- Stapes
2 structures formed from third arch
- Lower half of hyoid
- Greater cornu of hyoid
structures formed from sixth arch
Laryngeal cartilages
- Thyroid cartilage
- Cricoid cartilage
MUSCLES OF THE BRANCHIAL ARCHES TOGETHER WITH INNERVATION
Identify arches with nerves
Identify
identify
Which structures (expect cartilages) developing from 1st pharyngeal pouch?
- Muscles of mastication
- Mucous membrane (anterior ⅔ of tongue)
- Maxillary artery
Which structures (expect cartilages) developing from 2nd pharyngeal pouch?
- Smiling muscles (CN VII)
Which structures (expect cartilages) developing from 3rd pharyngeal pouch?
- stylopharyngeus m
- Glossopharyngeus m.
