Fig. 1From: Induction of granulation tissue for the secretion of growth factors and the promotion of bone defect repairInduced membrane, periosteum, and epimysium sections with hematoxylin-eosin staining (×100). a A large number of capillaries and inflammatory cell infiltration at 2 weeks membrane. b Small blood vessels formed and vessel number decreased at 6 weeks. c The periosteum, inner layer of a large number of vessels and the outer layer of fibrous tissue. d The epimysium, no obvious hierarchy; contains blood vessels with fat vacuoles. Black arrows indicate blood vessels (Bar = 200 μm)Back to article page