Question

Arrange the following key steps in the process of endochondral ossification in the correct order:

a) Formation of bone collar, Calcification of cartilage matrix, Formation of primary ossification center, Invasion of blood vessels and osteoblasts, Formation of secondary ossification center
b) Invasion of blood vessels and osteoblasts, Formation of primary ossification center, Formation of bone collar, Calcification of cartilage matrix, Formation of secondary ossification center
c) Calcification of cartilage matrix, Formation of bone collar, Invasion of blood vessels and osteoblasts, Formation of primary ossification center, Formation of secondary ossification center
d) Formation of primary ossification center, Calcification of cartilage matrix, Formation of secondary ossification center, Formation of bone collar, Invasion of blood vessels and osteoblasts

Answer 1

The correct order of key steps in the process of endochondral ossification is: formation of bone collar, calcification of cartilage matrix, formation of primary ossification center, invasion of blood vessels and osteoblasts, and formation of secondary ossification center.

Step-by-step explanation:

The correct order of key steps in the process of endochondral ossification is:

1. Formation of bone collar
2. Calcification of cartilage matrix
3. Formation of primary ossification center
4. Invasion of blood vessels and osteoblasts
5. Formation of secondary ossification center

Endochondral ossification is the process by which bones are formed from cartilage. It begins with the formation of a bone collar, followed by the calcification of the cartilage matrix. Then, the primary ossification center develops, followed by the invasion of blood vessels and osteoblasts. Finally, the secondary ossification center forms.