Thus, the fibrous system is both the fastest (in communicating) and the slowest (in responding) of the three. The speed of plastic deformation and remodeling in the connective tissue system, however, is measured in weeks, months, and even years. The fluid systems circulate chemistry around the body every few minutes, though many chemical rhythms fluctuate in hourly, daily, or as women know, monthly cycles. Dripping through the synapses and interstitia of this system are the messenger molecules of hormones, neurotransmitters, and neuropeptides, regulating neural tone both up and down the system (Pert 1997). Vesalius detailed the neurological and vascular systems in 1548, a miraculous feat of dissection given the methods of the time. And every cell needs to be structurally held in place (or directed in a flow, in the case of blood and other mobile cells) by the connective tissue net. Without the ability to deliver chemistry and suck away waste, any underserved area becomes stressed, then distressed, and will finally shrivel or burst and die, as happens in necrotic or gangrenous tissue. To preserve their genes, they must ultimately find another similar community of cells and go through a complex dance in order to reproduce. Most organismic cell-collections breast cancer zometa order 60 mg evista amex, to avoid massive cell death, require a constant flow of fluids, exchange of gases, and a regular trade of food for waste.
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