Bone Flashcards
Bone functions
provides support and protection
provides rigid levers for muscles to work
Calcium supply
Compressive strength
the maximum load a material can withstand before permanently deforming or breaking
What contributes to bone stiffness
Calcium Phosphate
Calcium Carbonate
What contributes to bone flexibility
Collagen
What else affects bone strength
Water
Bones porosity
Anisotropic
different strength and stiffness depending on the direction of the load
Type 1 Osteoporosis
postmenopausal, affects about 40% of women after 50
Type 2 Osteoprorosis
age, affects most people after 70
What diminishes bone density
lack of weight bearing exercise
time in water
bed rest
traveling in space
how do bones grow in length
the epiphyses, or epiphyseal plate
how do bones grow in circumference
at the periosteum
Wolff’s Law
the densities, sizes, and shapes of bones are determined by the magnitude and direction of the acting forces
