Second Timers GD: Bones 3 (U-Y)

How thick was your skull when you were born and how thick is it now?

How does your skull grow larger? Part of the process is the osteoblasts laying new bone on the “top side” of the skull.

The skull is made of trabecular bone with compact bone on both sides of it.

The osteoblast creates a complete seal with the bone until there is a firm pocket underneath it where the bone dissolving takes place.

The osteoblasts have precise molecular receptors on the outside of their cell membrane.

Molecules are sent to the osteocyte bone cells from the parathyroid gland which is on the neck.

Food and oxygen come to the imprisoned osteocyte cells through cave-tubes called…