Fig. 3
From: A novel construct with biomechanical flexibility for articular cartilage regeneration
TEM and SEM images of the BMSC/PRF construct. A1–D1 TEM images at low magnification (× 5000, bar = 2 μm). A2–D2 TEM images at high magnification (× 10,000, bar = 1 μm,); yellow arrow points to the endoplasmic reticulum structure. E1–H1 SEM images at low magnification (× 1000, bar = 50 μm). E2–H2 SEM images at high magnification (× 3000, bar = 10 μm); white arrow points to granular secretions and red arrow points to reticular collagen fibers