Legend: S - skin; P - periosteum; T - spongy bone trabecula (spicula); Ob - osteoblasts; Oc - osteocyte; M - mesenchyme; BV - blood vessel  Legenda: S - koža; P - periost; T - gredice spužvaste kosti; Ob - osteoblasti; Oc - osteocit; M - mezenhim; BV - krvna žila