Fig. 1From: Exosomes derived from three-dimensional cultured human umbilical cord mesenchymal stem cells ameliorate pulmonary fibrosis in a mouse silicosis model3D cultivation of hucMSCs. a 3D dynamic culture system of hucMSCs. b Proliferation multiple of hucMSCs cultured in suspension over a period of 7 days. c Representative image for hucMSC spheroids on day 3, day 5, and day 7 (green: live cells, red: dead cells). Bar = 200 μmBack to article page