the primary centers of ossification are first to form but last to fuse
There is no bone that violates the laws of ossification. Ossification is the process by which bone tissue forms and hardens, and it follows specific biological principles that apply to all bones in the body.
Endochondral ossification
ossification
Intramembranous ossification
ossification
Intramembranous and Endochondral Ossification
Ossification (or osteogenesis) is the generic term for bone formation. There are two basic types: membranous ossification and endochondral ossification.
Ossification occurs when bones are formed.
Intramembranous ossification
There are two ways bones are formed, intramembranous ossification, and endochondral ossification. Intramembranous ossification is how the flat bones are formed, while the long bones are formed with endochondral ossification.
Endochondral ossification is the type of ossification in bones that are formed in cartilage. This process involves the replacement of cartilage by bone during development and growth.
Secondary ossification centers appear in the epiphyses.