A fibroblast is a type of cell that synthesizes the extracellular matrix and collagen, the structural framework (stroma) for animal tissues, and plays a critical role in wound healing.Fibroblasts are the most common cells of connective tissue in animals.ibroblasts and fibrocytes are two states of the same cells, the former being the activated state, the latter the less active state, concerned with maintenance and tissue metabolism.
Longest-serving Representative to serve in the House: With more than 59 years of service, Representative John Dingell, Jr., of Michigan, holds the record for longest consecutive service. Longest-serving Speaker of the House: Sam Rayburn of Texas served as Speaker for a total of 17 years, two months, and two days. Oldest person recorded to have served in the House:
Heâs been there ever since, serving on some of the most influential committees in that body. The 87-year-old Democrat currently serves as chair of the U.S. Senate Committee on Appropriations. With more than 48 years of service in the Senate, Inouye trails only former West Virginia Senator Robert Byrd (51 years, 176 days) as the longest-serving senator. 1. John Dingell