Head and Neck Embryology GBA Flashcards
2nd Pharyngeal Pouch (Endoderm):
2nd Pharyngeal Pouch (Endoderm):
Palatine Tonsil Epithelium
3rd Pharyngeal Pouch (Endoderm):
3rd Pharyngeal Pouch (Endoderm):
Inferior Parathyroid Glands
Thymus
Lateral Nasal Prominence
Alae of the Nose
2nd Pharyngeal Arch (Mesoderm+NC Cells):
Artery, Cartilage, Bones, Muscles and Nerve
(Nerve is only associated and comes from Ectoderm)
2nd Pharyngeal Arch: Artery - Stapedial Cartilage - Reichert's Bones - Hyoid (Upper), Styloid, Stapes Muscles - Mimatic, Stylohyoid, Posterior Digastric Belly, Stapedius Nerve - Facial VII
3rd Pharyngeal Arch (Mesoderm+NC Cells):
Artery, Cartilage, Bones, Muscles and Nerve
(Nerve is only associated and comes from Ectoderm)
3rd Pharyngeal Arch: Artery - Common Carotid Cartilage - None.. Bones - Hyoid (Lower) Muscles - Superior Pharyngeal Constrictor Nerve - Glossopharyngeal IX
Medial Nasal Prominence
Nasal septum
Ethmoid
Cribriform Plate
Philtrum
Nasolacrimal duct is formed..
Nasolacrimal duct is formed from the groove between Nasal placode and Maxillary Prominence
Mandible Prominence Derivatives:
Mandible + Squamous part of Temporal Bone
Lower Lip and Cheek
Maxillary Prominence Derivatives:
Maxilla, Part of Vomer, Zygomatic Bone
Upper Lip and Cheek
Where will the Developing Eye come from? (Physically)
from the LATERAL aspect of developing face.
Lens Placode
6th Pharyngeal Arch (Mesoderm+NC Cells):
Artery, Cartilage, Bones, Muscles and Nerve
(Nerve is only associated and comes from Ectoderm)
6th Pharyngeal Arch: Artery - Pulmonary Arteries Cartilage - Cricoid Cartilage Bones - None.. Muscles - Middle and Inferior Pharyngeal Constrictor, Laryngeal Muscles. Nerve - Vagus X + Accessory XI
1st Pharyngeal Cleft (Ectoderm):
Structures Formed
1st Pharyngeal Clefts (Ectoderm):
External Acoustic Meatus - Epithelium+Tympanic Membrane.
2nd-4th Pharyngeal Clefts (Ectoderm):
Structures Formed
2nd-4th Pharyngeal Clefts (Ectoderm):
Cervical Sinus
Secondary Palate formation
two palate shelves from lateral edges of the developing oral cavity
4th Pharyngeal Pouch (Endoderm):
4th Pharyngeal Pouch (Endoderm):
Superior Parathyroid Glands
1st Pharyngeal Pouch (Endoderm):
1st Pharyngeal Pouch (Endoderm):
Auditory Tube, Tympanic Cavity - Epithelium
Facial Development time point
4th to 5th week
Name of the Primordial Mouth:
what is unique about it?
Stomodeum
Just like the Proctodeum it is a “sticky” adhesion of Endoderm and Ectoderm
What covers the Stomodeum in early Facial Development?
Buccopharyngeal Membrane
5th Pharyngeal Pouch (Endoderm):
5th Pharyngeal Pouch (Endoderm):
Thyroid Gland - C-Cells
Ultimobranchial Body
1st Pharyngeal Arch (Mesoderm+NC Cells):
Artery, Cartilage, Bones, Muscles and Nerve
(Nerve is only associated and comes from Ectoderm)
1st Pharyngeal Arch:
Artery - Maxillary
Cartilage - Meckel’s
Bones - Mandible, Maxilla (Partly), Malleus and Incus (other Viscerocranium Bones)
Muscles - Mastications, Tensor Tympani, Tensor Veli Palatini, Mylohyoid, Anterior Digastric Belly.
Nerve - Trigeminal-Mandibular V3
4th Pharyngeal Arch (Mesoderm+NC Cells):
Artery, Cartilage, Bones, Muscles and Nerve
(Nerve is only associated and comes from Ectoderm)
4th Pharyngeal Arch: Artery - Aortic Arch Cartilage - Thyroid Cartilage Bones - None.. Muscles - Middle and Inferior Pharyngeal Constrictor, Laryngeal Muscles. Nerve - Vagus X + Accessory XI
