What is Perichondral bone?
[ pĕr′ĭ-kŏn′drəl ] n. A collar or cuff of osseous tissue that forms in the perichondrium of the cartilage in the development of a long bone.
What is the meaning of intramembranous ossification?
Intramembranous ossification is the direct deposition of bone on thin layers of connective tissue and is characteristic of the bones on the top of the skull.
What characteristics does the Perichondral bone have?
Perichondral bone is laid down at the surface of the cartilaginous template by cells that were formerly part of the perichondrium. The cells have now characteristics of osteoblasts and secrete bone matrix or a mixture of cartilage and bone matrix (Huysseune, 2000; Huysseune and Sire, 1992a; Verreijdt et al., 2002).
What are examples of intramembranous bone?
Examples in the human body
- Flat bones of the face.
- Most of the bones of the skull.
- Clavicles.
What is the difference between endochondral and intramembranous bone healing?
During endochondral ossification cartilage is formed, calcified and finally replaced by bone; whereas in intramembranous ossification, bone tissue is directly synthesized by osteoblasts formed through mesenchymal stem cell differentiation (MSC) (Doblaré et al., 2004).
What is the difference between intramembranous ossification and endochondral ossification quizlet?
INTRAMEMBRANOUS OSSIFICATION: forms the flat bones of the skull, face, jaw, and center of clavicle. bone is formed in sheet-like layers that reseamble a membrane. ENDOCHONDRAL OSSIFICATION: forms most bones in the body, mostly long bones, and replace cartilage with bone.
Why does intramembranous ossification occur?
Intramembranous ossification begins in utero during fetal development and continues on into adolescence. At birth, the skull and clavicles are not fully ossified nor are the junctions between the skull bone (sutures) closed. This allows the skull and shoulders to deform during passage through the birth canal.
What are the major events of intramembranous ossification and endochondral ossification and how are they different quizlet?
There are two processes: Intramembranous ossification (conversion event) is the direct laying down of bone into the primitive connective tissue (mesenchyme); perichondral membrane converted to osteoblasts. Endochondral ossification (replacement event) involves cartilage as a precursor; cartilage is replaced with bone.