00:01
All right, so let's go through some differences between spongy and compact bone.
00:05
So starting off with compact bone here.
00:07
It's formed on the outer layer of bones, so it's the hard outer layer, and it's composed of osteons.
00:14
So osteons, and if you'll remember, osteons are the sort of tubular structures with the haversian canals with blood vessels and nerves in the center, and the lamella forming the matrix for the rest of the osteon.
00:30
So it's composed of osteons and compact bone occurs where the stresses are applied in select directions.
00:39
So stress in few directions, right? because the osteons have that tubular structure that is good at withstanding stress in the direction that it grows, but not so much in opposing directions.
01:04
So perpendicular stresses compact bone doesn't deal so well with.
01:10
And that leaves us with spongy bone...