Cavitation. The chondrocytes (cartilage cells) go through hypertrophication or enlargement and signal the hyalin cartilage to harden into bone. This hardening into bone is called calcification. The calcified hyalin cartilage is impermeable to the diffusion of nutrients. Since the chondrocytes cant receive any nutrients they begin to die and leave small cavities. These small cavities leave room in the hardened bone for blood vessels to travel through.
Freebase(0.00 / 0 votes)Rate this definition: Farb. Farb is a derogatory term used in the hobby of historical reenacting in reference to participants who are perceived to exhibit indifference to historical authenticity, either from a material-cultural standpoint or in action. It can also refer to the inauthentic materials used by those reenactors.
(March 2014). An institutional review board (IRB), also known as an independent ethics committee (IEC), ethical review board (ERB), or research ethics board (REB), is a committee that has been formally designated to approve, monitor, and review biomedical and behavioral research involving humans.n the United States, IRBs are governed by Title 45 Code of Federal Regulations Part 46. These regulations define the rules and responsibilities for institutional review, which is required for all research that receives support, directly or indirectly, from the United States federal government.