�mitochondria, lysosome, synovial fluid-filled sac, endothelial cell layer, tendril-like structure, fibroblast, neuronal cluster, cilia, mycelium, axon, capillary bed, ductal system, microelectromechanical system (MEMS), nanowire, suture thread, implantable pacemaker housing, sensor array, transdermal needle, vascular graft, bone graft scaffold, osteocyte, periosteum, tissue-engineered construct