" The skeletal cells produce a chitinous extracellular matrix, in reality modified cell walls, which serves a similar role to cartilage in bone formation. The red tissue produces the enzymes which sclerotize this matrix as it grows. "
I wanna know more about this, I like it a lot, does the bone have stem cells on the outer surface that continually add to a larger and larger bone until reaching a diameter, with growth plates on the ends like real bones providing extension, with strips of red tissue stringing through it in order to provide nutrients as well as the sclerotizing hormones? This would result in Bones that have growth patterns reminiscent of the rings and trees I would think.
Alternatively having the stem cells inside the bones, producing fresh tissue from the inside pushing out, with particular cracks along the outermost oldest bone as it grows, again with strips of red tissue flowing throughout it for nutrients as well as securitizing hormone. This growth formation would be more reminiscent of bark on Old trees.
It also brings into question how does old bone get dealt with, and how does bone get mended.
Do the green tissues inside the bone have digestive enzymes for destroying scleratized cell walls? That may be very convenient regarding healing fractures. It would also I think allow for very smooth cleanup regarding old bone.
It could also result in a syndrome where green tissue in the bones destroy the sclerotized cell walls too early and result in brittle bones, wobbly bones or soft bones...