Not every relation is a function. But every function is a relation. Function is just a part of relation.
The cubic function.
Range
A formula or graph are two ways to describe a math function. How a math function is described depends on the domain of the function or the complexity of the function.
The Mandelbrot graph is generated iteratively and so is a function of a function of a function ... and in that sense it is a composite function.
epineurium, perineurium, endoneuriumEpinerium, perineurium, endoneurium.
The perineurium is found in the peripheral nervous system. It is a membrane which forms a protective sheath around the fascicles (bundles of nerve fibres).
Perimysium.
Endoneurium - first Perineurium - second Epineurium - third
The coarse connective tissue that covers each fascicle (bundle of fibers)
Fascia is up of sheets or bands of connective tissue fibres.
A bundle of nerve fibers is surrounded by perineurium, a connective tissue that wraps around them.
Perineural cells are formed from the perineurium, which is the middle layer of the protective perineural sheath. These cells isolate bundles of axons from connective tissues and form a diffusion barrier
it surrounds fascicles of nerve fibers (axons) in the peripheral nervous system
The connective tissue surrounding the fascicle of a muscle is the perimysium.
Function
The parent function of the exponential function is ax