BIOL 204 Study Guide - Midterm Guide: Endochondral Ossification, Haemal Arch, Intramembranous Ossification
Document Summary
Lab 4: compare + contrast structure of bone and cartilage. Made by ossification depositing calcium phosphate into a matrix of protein fibres. Matrix of polysaccharides and protein fibres (ex. collagen). No blood vessels or nerves, all nourishment by diffusion. Both surrounded by matrix the two types. Classify a given bone as dermal or endochondral and describe main diff between. Endochondral ossification allows endochondral bones to grow longer. Lengthening happens when chondroblast at ends of bone and at epiphyses form new cartilage which is then ossified. Formed from mesenchyme (of dermis) that ossified directly into bone. Mesenchymal cells organize into flat sheets ( membranes ) that produce matrix of protein fibres that then ossifies. Dermal bone is usually plate like but can grow thicker or at the edges. Periosteum surrounds outer surface of bone and can produce new bone tissue (by intramembranous ossification) to widen and strengthen bone. Compact bone: appears solid with naked eye.
