A bone shows concentric lamellae surrounding a federal strait..?

Is the sample from the cortex or the marrow cavity of a long bone?

The fine structure of compact bone consists of a not easy matrix arranged as plates called concentric lamellae.
marrow cavity is basically that a cavity filled near bone marrow
The structure you are talking nearly "Haversian's lamellae" are found in the cortical plates
You are describing a haversian system (also call an Osteon).

These are only found contained by cortical bone

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