Question

Cortical bone resists this type of loading the least: A) bending B) compression C) tension D) torsion

Answer 1

Cortical bone is also known as a compact bone, this bone is one of the 2 types of bone found in human body one is compact and the other one is cancellous(spongy) is always found in deep cortical bone and serves as an internal support structure.

• In compact part, it has some functional units and this functional units we called as asteon.
• Asteons sometimes called as haversian system and thats because of their shape and it runs parallel to the first axis of the bone.
• In osteon we can find collagen fibers within bone matrix run in seperate direction which is actaually provide torsion strength to the bone.
• we have haversion canal at the cetre of each osteon so we acn call it as central canal. it supplies oxygen to blood cells and nerves.
• volkmann's canal also there in cortial at right angle to the central, this going to allow all of the connection for the haversian system.
• canaliculi connects the lacunae and osteocytes in cortial.

we can say that cortaial is very strong from oueside and have a spongy structure from inside so it supports for bending, compression , tension, torsion.