part of part of participates in myofibroblast cell secondary crest myofibroblast 2023-03-16T09:17:47Z SCMFs secondary-crest myofibroblast SCMF A myofibroblast that is part of an alveoli during alveolarization. The contractile force of this cell elongates the secondary crest, while producing a framework of elastin and tenascin. During the maturation of the septa, secondary crest myofibroblasts, together with matrix fibroblasts, secrete metalloproteinases and other ECM‐remodeling proteins to thin the septal tip ECM. The secondary crest myofibroblast continues producing elastin, eventually undergoing apoptosis during adulthood. alveolar myofibroblast https://cdn.humanatlas.io/digital-objects/2d-ftu/lung-pulmonary-alveolus/v1.3/assets/2d-ftu-lung-pulmonary-alveolus.png lung alveolus development lung connective tissue