o The prianary minoral in z calcium 7. The stem cells of osteoclasts are A. chon

Question

o The prianary minoral in z calcium 7. The stem cells of osteoclasts are A. chondrocytes C monoeytes E osteoclasts &Woven; bone A. is very light in weight. B. is not easily restructured. C is organized into thin sheets of tissue. D. has a porous appearance E. has its collagen fibers randomly oriented 9 Cancellous bone tissue B A. contains interconnecting plates called trabeculae. CB. contains concentric lamellae. D C. is the primary component of compact bone E. D is very dense E. has many spaces and lacks osteocytes. 10. The covering of the outer surface of bone is the A. periosteum B. trabeculac. C. lamellac D. lacunae. E. canaliculi

Explanation / Answer

6- E: Calcium. 70% of bone is made up of bone mineral called hydroxyapatite, which is naturally occuring form on calcium apatite.

7- C: Monocytes. monocyte phagocytic system is the precursor of osteoclasts.

8- E: Has its collagen fibre randomly oriented. Woven bone is characterized by irregularly arranged matrix of collagen fibres and is weak.

9- B: Contains concentric lamellae. consists of lamellae arranged in an irregular pattern of thin columns (trabeculae).

10- A: Periosteum. Periosteum covers the outer surface of the bone.

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