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
: 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.
(b) calcium and phosphorus