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:
The President pro tempore (/ËproÊ ËtÉmpÉriË/ or /ËproÊ ËtÉmpÉreÉª/), or president pro tem, of the United States Senate is the longest serving Senator from a major political party in the United States Senate. According to the Constitution, this is the fourth highest office in the United States.fficially the Vice President is person in charge of the Senate, but he is not a Senator. Orrin Hatch (R-UT) is the President pro tempore. When the Vice President cannot be in charge, the President pro tempore is in charge of the Senate.