What is the term for the layers of bony matrix surrounding the vessels and nerve?

Explanation:

Each osteon consists of lamellae, layers of compact matrix surround a central canal (the haversian or osteonic canal) which contains the bone's blood vessels and the nerve Fibre. Osteon in compact bone tissue are aligned in the same direction along lines of stress, helping the bone resist bending or fracturing.

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explanation:

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.

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