FORS 3331 Lecture Notes - Lecture 4: Endochondral Ossification, Sphenoid Bone, Chondrocranium
25 Jan 2017
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Baker | fors 3331 | spring 2017 | lecture 4 | page 1. Phylogenetic - species differences (i. e. for humans = populations separated by several hundred. Skull - cranium and mandible: mandible - lower jaw, cranium - skull without the mandible, calvaria - cranium without a face, calotte - calvaria without a base. Aka dermal bones: cartilage-replacement elements - form in the branchial arches. Chondrocranium - the mass of cartilage that condenses beneath the embryonic brain. Basicranium - bones that replace the chondrocranium cartilage. All these elements fuse to form cartilaginous chondrocranium: ossification centers appear and spread in the cartilage later on, bones that replace the chondrocranium represent the primitive vertebrate braincase. All the nerves and vessels passing to and from the brain traverse holes in or. Baker | fors 3331 | spring 2017 | lecture 4 | page 2. The bones of the face are also dermal bones (derived from the snout part of the old head shield)
