What is ossification?
The process Bone formation
Horizontal lines on lone bones that provide visible proof of illness
Growth arrest lines
How does ossification/osteogenesis differ between embryos and adults?
In embryos- the process forms bony skeleton
In adults- process is mainly for remodeling and repair
When a bone develops by replacing hyaline cartilage
What is the process of endochondral ossification?
When a bone develops from a fibrous membrane
What is the process of intramembranous ossification?
What is the result of intramembranous ossification?
Membrane bone
What is the result of endochondral ossification?
Cartilage, endochondral, bone
During development, Which bones are formed of endochondral ossification ?
Essentially all bones below the base of the skull
Which type of ossification forms the cranial bones and the clavicles?
Intramembranous ossification
List the steps of intramembranous ossification:
- ) ossification center appears in fibrous CT
- ) osteoid is secreted within the fibrous membrane and calcifies
- ) woven bone and periosteum form
- ) lamellar bone replaces woven bone, just deep to the periosteum. Red marrow appears
List the steps to endochondral ossification:
- ) bone collar forms around diaphysis of hyaline cartilage model
- ) cartilage in center of diaphysis calcifies and then develops cavities
- ) periosteal bud invades internal cavities and spongy bone forms
- ) diaphysis elongates and medullary cavity forms
- ) epiphyses ossify
