| Obsolete | false |
| description | 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. |
