Is this recycled paper? No, it is made from 100% sustainable and renewable paper fibers, never any post-consumer waste paper that may have inks and dyes. All of our bedding products are also 100% biodegradable and compostable, so you get superior performance along with a product that's good for your pet and good for the planet.
Definition of sustentacular cell. : a supporting epithelial cell (such as a Sertoli cell or a cell of the olfactory epithelium) that lacks a specialized function (such as nerve-impulse conduction) new! Time Traveler
Olfactory receptor cells, actually neurons, are the site of transduction. Olfactory receptor cells are the only neurons in the nervous system that are regularly replaced (they last about 4-8 weeks). The size of the epithelium is a good indicator of the acuity of an animal's sense of smell.