Which of the following is formed by endochondral ossification? (a) Mandible (b) Clavicle (c)...

Question:

Which of the following is formed by endochondral ossification?

(a) Mandible

(b) Clavicle

(c) Femur

(d) Bones of skull.

Endochondral Ossification Background Information:

Endochondral ossification begins in late gestation and is the process of bone tissue creation through the means of a cartilage precursor. At the beginning of the endochondral ossification process a hyaline cartilage model is formed from chondroblasts which secrete the cartilage matrix. The cartilage model grows by interstitial and appositional growth until a primary ossification center is formed. Blood vessels then invade the cartilage to bring in osteoprogenitor cells to form the secondary ossification center. The epiphyseal growth plate is responsible for maintaining growth and when growth is complete an epiphyseal line is formed.

Answer and Explanation: 1

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Bone formation is classified into 2 types:

  1. Intramembranous, which is simple and requires no cartilage precursor.
  2. Endochondral, which requires a...

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Bone Growth & Development Factors: Endochondral Ossification

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Chapter 5 / Lesson 3
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Bone formation in the human body begins during fetal development. After birth, endochondral ossification performs a major role in bone elongation, which is accomplished through the epiphyseal plate. Learn about bone growth, development factors, bone growth after birth, the process of bone formation (intramembranous ossification and endochondral ossification), and how ossification works in the development of bones.


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