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