View the animation below, then complete the quiz to test your knowledge of the concept.

1		Bone producing cells are...
			A)	lamellae.
			B)	osteons.
			C)	osteoblasts.
			D)	periosteum.
			E)	endosteum.
2		The concentric rings of bone produced are...
			A)	lamellae.
			B)	osteons.
			C)	osteoblasts.
			D)	periosteum.
			E)	endosteum.
3		The combination of all of the concentric rings of bone built around a single blood vessel is called a(n)...
			A)	lamella.
			B)	osteon.
			C)	osteoblast.
			D)	periosteum.
			E)	endosteum.
4		Bone building cells beneath the endosteum lay down bone to form ridges around a blood vessel.
			A)	True
			B)	False
5		Once a tunnel of bone is formed around a blood vessel, the bone building cells of the periosteum lay down bone in concentric circles that fill in the tunnel.
			A)	True
			B)	False