Kinesiology 2241A/B Lecture Notes - Lecture 11: Hyaline Cartilage, Collagen, Calcium Phosphate
20 Apr 2016
School
Department
Course
Professor
Document Summary
Once skeleton fails, structure of body changes: acts like scaffolding. Calcium phosphate (mineral)- gives bone its rigidity, hardness. Two types: cortical- dense outside, trabecular- inner webbing. Properties of bone and cartilage: endure loads, will respond to forces/loads, regions of bone will go through tension and compression, ex. head of femur. Webbing of trabecular bone follows load lines- striations of bone. Not completely static, stress will change its shape. Will hit elastic limit (return to normal shape) Goes into plastic region (starting to do damage) Strain in bone is different depending on speed of loading. Broken leg- fast loading rate coming down from jump, failed quickly. Going sideways- curve changes by how bone is loaded. Ability to deal with stress/deformation becomes less. Broken leg video as contacted ground, applying shear load to bone, landed on an angle = more shear, fast loading rate. Any cartilage that covers the contact ends of your bones (shoulder, ankle, hip, etc. )
