Bone growth in width

how is the shape of bone maintained as we grow

via bone growth and remodeling! growth in length happens via interstitial growth at epiphysis.. at same time remodeling via appositional growth will widen the bone, helping maintain the shape.

What is the process of bone growth in width called

appositional growth

how is the bone affected by appositional growth

bone diameter increases, cortical width increases, and medullary cavity size increased

step 4 of appositional growth

bone will grow outwards as osteblasts in periosteum build new circumferential lamellae which will close in on a vessel creating a new osteon. this process keeps repeating

step 3 of appositional growth

lamellae will form inwards via osteoblasts in endosteum and close the tunnel, forming the central canal and a new osteon

what cells are involved in appositional growth

periosteal osteogenic, osteoclast, and osteoblast cells. periosteal osteogenic cells that will differentiate into osteoblasts who build bone on outer surface. endosteal osteoclasts will digest inner bone in the endosteum increading the diameter of medullary cavity.

step 2 of appositional growth

periosteal ridges will fuse ariund the blood vessel, creating an endosteum lined tunnel

step 1 of appositional growth

ridges in the periosteum create grooves for the periosteal blood vessel