NCERT Important Questions Class 9 Science biology Chapter 6
Important NCERT Extra Questions
Chapter 6 Tissues
NCERT Book Extra Questions for Session 2022-2023
CBSE Board and UP Board Others state Board
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NCERT Important Questions Class 9 Science biology Chapter 6
Important NCERT Extra Questions
Chapter 6 Tissues
NCERT Book Extra Questions for Session 2022-2023
CBSE Board and UP Board Others state Board
(b) calcium and phosphorus
(B) Calcium and phosphorus
: Bone cells are embedded in a rigid matrix, strengthened by fibers, and hardened by calcium and phosphorus salts. The matrix is deposited as concentric layers of lamellae formed around the central Haversian canal.