What Accounts for the Majority of Bone (Osseous)tissue Matrix

Question

What accounts for the majority of bone (osseous)tissue matrix?
A)calcium salts
B)bone marrow
C)osteoid
D)collagen fibers

Accepted Answer

The majority of bone tissue matrix is made up of calcium salts, specifically hydroxyapatite, which gives bone its hardness and ability to resist compression. While collagen fibers (D) also contribute to the strength and flexibility of bone, they make up a smaller proportion of the matrix. Bone marrow (B) is found within the medullary cavity of long bones and serves as the site of hematopoiesis (blood cell formation), but does not make up a significant portion of the bone matrix. Osteoid (C) refers to the organic portion of the bone matrix that is produced by osteoblasts, but again, this makes up a smaller proportion than the calcium salts.