Depending on the granularity, this powder can have an abrasive feel, similar to pumice powder, and has a low density as a result of its high porosity. The typical chemical composition of oven-dried diatomaceous earth is 80 to 90% silica, with 2 to 4% alumina (attributed mostly to clay minerals) and 0.5 to 2% iron oxide. Diatomaceous earth consists of fossilized remains of diatoms, a type of hard-shelled algae.
A Pacinian corpuscle is a type of touch receptor located in the skin. It is classed as a mechanoreceptor, meaning it is part of the group of sensory receptors that respond to touch and pressure.lthough there are similarities between the two, a Pacinian corpuscle is not as discriminatory as the type of fine-touch mechanoreceptor present in the fingertips, known as Meissner's corpuscle. This type of sensory receptor lies closer to the surface of the skin and adapts only moderately fast.
Pacinian corpuscles are large receptors, located deep within the skin. Each cutaneous receptor (including Pacinian corpuscles) contains a nerve ending that is, essentially, the dendrite of a neuron whose cell body is located in a ganglion near the spinal cord, the dorsal root ganglion.he nerve fibers that innervate skin receptors have their cell bodies in the dorsal root ganglion, a group of neuron cell bodies near the spinal cord. The axons of dorsal root ganglion cells project in to the spinal cord, where they synapse with neurons in the dorsal horn of the grey matter.