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Histological images of periosteum from skeletally mature bone (A) of an aged human and middle aged sheep (B). (A) In a cross section of the mid-diaphysis of the human tibia (patient age at death: 69 years). Image used with permission.31 (B) In a cross section of the mid-diaphysis of the ovine femur (∼4 years of age). Image adapted and used with permission.29 CL, cambium layer; FL, fibrous layer. Color images available online at www.liebertpub.com/teb
