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Vertebrate Zoology
Tissue Types
Question | Answer |
---|---|
Collagen | Tough, fibrous protein; Earliest skeletal support; Ancestral pre-vertebrate; Provides matrix for vertebrate skeletons; Rigid, not elastic |
Cartilage | Avascular and unorganized; Formed of chondrocytes; Can be hardened with mineralization; Formed majority of endoskeletons of early vertebrates |
Bone | Vascular and organized into osteons; formed of osteocytes; Vascular nature allows nutrients and waste to be moved; Two Types |
Two Types of Bone | Dermal bone in dermis of skin, exoskeleton; Endochondral for internal skeleton, of cartilage descent |
Enamel and Dentine | First on scales of agnathan; Hard dermal plates in bone |