Bone formation discusses the process of ossification and how bone is formed.
The formation of bone is often referred to as either ossification or osteogenesis. There are two types of ossification: intramembranous and endochondral ossification.
- Intramembranous ossification is the formation of bones in place of connective tissues.
- Endochondral ossification begins with forming a primary ossification center at the hyaline cartilage, where the hyaline cartilage serves as the template for the formation of the bone.
Bone growth is either longitudinal or appositional.
Longitudinal bone growth is the ossification of the bone that grows lengthwise until they stop growing.
Appositional bone growth continues till death and is the growth of the bones in diameter or thickness. In appositional bone growth, the bones are formed in the outer external surface while the old inner bones break down.
The process of ossification results in the formation of three types of bone cells: osteoblasts, osteocytes, and osteoclasts.
1. What are the 5 stages of bone growth?
2. What are the three types of bone growth?
Osteoblasts, osteocytes, and osteoclasts are the three types of bone cells formed during different bone growth stages.
3. Which bones grow the most?
Long bones keep growing since birth. During adolescence, when there is maximum bone growth, the long bones of the legs and arms and the nose grow the fastest.
4. How does bone grow and develop?
The bone grows and develops through the process of osteogenesis or ossification.
5. What are bones made of?
Bones are made of protein collagen that forms the skeleton of the bone, which gets strengthened and hardened with the deposition of the mineral calcium phosphate.
6. What are the two types of bone development?
The two types of bone development are intramembranous and endochondral ossification.
7. Why do bones stop growing?
Bones stop growing during early adulthood because of maturation, but the bone mass increases until the late twenties.
8. What is longitudinal bone growth?
The epiphyseal plate is the region where longitudinal growth occurs, increasing the length of the bone.
9. How do bones grow and change with age?
Bones keep growing with age until full growth is reached, after which the bone builds mass and density. The bone later keeps repairing itself to remain new and strong until old age, when this process slows down drastically.
10. What is the appositional growth of cartilage?
Appositional growth is the growth of the bone across the diameter, and the bones grow on their surface.
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