The leader line in question highlights two structures pertaining to compact bone.
The histological slides show a microscopic view of a sample of compact bone. In slides pertaining to compact bone, we can identify the following cells and structures:
- cement line
- central canal
- interstitial lamella
- osteocyte
- osteon
The leader line in the image on the left is highlighting the interstitial lamella. This structure corresponds to layers of bone matrix that surround the osteons in compact bone slides. The image on the right is highlighting the osteon itself. The osteon is the primary structural unit of the bone, comprised of layers of lamellae surrounding the central canal.
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