<prompt> Endochondral ossification is seen in -Long bonesFlat bones of skullvault of skullNasal bones  <response>: Endochondral ossification : Bone formation within cailage hyaline cailage Long bones which undergo Endochondral ossification : TYPES OF OSSIFICATION: 1. Endochondral ossification - Most long bones. 2. Intramembranous ossification - Flat skull bonesVault bones. 3. Both Endochondral and intramembranous - Clavicle Mandible intramembranous Endochondral 