Download - The Vertebrate Skull:
The Vertebrate Skull:Introduction and Development
The Vertebrate SkullIntroductionIntroduction
Before we begin…
Gastrulation and mesoderm
Key Embryonic Structures
The Vertebrate SkullReviewReview
Neurulation and neural crest
Key Embryonic Structures
The Vertebrate SkullReviewReview
Basic vertebrate body plan
Key Embryonic Structures
The Vertebrate SkullReviewReview
Branchial/pharyngeal arches
Hyaline cartilage
Key Tissues
The Vertebrate SkullReviewReview
Bone
Key Tissues
The Vertebrate SkullReviewReview
Endochondral vs. dermal
Chondrocranium
3 Subdivisions of the Skull
The Vertebrate SkullReviewReview
Chondrocranium
3 Subdivisions of the Skull
The Vertebrate SkullReviewReview
Splanchnocranium
Chondrocranium
3 Subdivisions of the Skull
The Vertebrate SkullReviewReview
Splanchnocranium
Dermatocranium
Chondrocranium
3 Subdivisions of the Skull
The Vertebrate SkullReviewReview
Splanchnocranium
Dermatocranium
Chondrocranium
The Vertebrate Skull3 Divisions of the skull3 Divisions of the skull
Prechordal, parachordal, somitic mesoderm
Chondrocranium
The Vertebrate Skull3 Divisions of the skull3 Divisions of the skull
The Vertebrate Skull3 Divisions of the skull3 Divisions of the skull
ChondrocraniumOf Chondrichthyans
Tetrapods – 5 paired and 4 unpaired bones arise from chondrocranium
Chondrocranium
• Reptiles and Birds have a single occipital condyle. • Amphibians and mammals have paired occipital condyles.
Note: Occipital series (minus supra-) forms joint with first cervical vertebra:
The Vertebrate Skull3 Divisions of the skull3 Divisions of the skull
Why form a chondrocranium?
The Vertebrate Skull3 Divisions of the skull3 Divisions of the skull
Splanchnocranium
The Vertebrate Skull3 Divisions of the skull3 Divisions of the skull
Splanchnocranium1st branchial arch cartilages
2nd branchial arch cartilages
The Vertebrate Skull3 Divisions of the skull3 Divisions of the skull
SplanchnocraniumPrimitive design
The Vertebrate Skull3 Divisions of the skull3 Divisions of the skull
SplanchnocraniumChondrichthyans
The Vertebrate Skull3 Divisions of the skull3 Divisions of the skull
SplanchnocraniumTetrapods
The Vertebrate Skull3 Divisions of the skull3 Divisions of the skull
Dermatocranium
The Vertebrate Skull3 Divisions of the skull3 Divisions of the skull
DermatocraniumNeural crest
The Vertebrate Skull3 Divisions of the skull3 Divisions of the skull
DermatocraniumNeural crest formation and migration
The Vertebrate Skull3 Divisions of the skull3 Divisions of the skull
DermatocraniumNeural crest derivatives
The Vertebrate Skull3 Divisions of the skull3 Divisions of the skull
Tetrapods
The Vertebrate Skull3 Divisions of the skull3 Divisions of the skull
Dermatocranium
Major bones
The Vertebrate Skull3 Divisions of the skull3 Divisions of the skull
Dermatocranium
