Typically, engineered wood products are made from the same hardwoods and softwoods used to manufacture lumber. Sawmill scraps and other wood waste can be used for engineered wood composed of wood particles or fibers, but whole logs are usually used for veneers, such as plywood, MDF or particle board.
Mucus is a slippery secretion of the lining of various membranes in the body (mucous membranes). It is a viscous colloid containing antiseptic enzymes (such as lysozyme) and immunoglobulins. Mucus is produced by goblet cells in the mucous membranes that cover the surfaces of the membranes.
Where does all that snot come from? Snot is just a form of mucus, a slimy secretion produced by the mucus membranes which line all external cavities of the body exposed to the outside environment. The job of mucus is to lubricate and protect these parts of the body. Your respiratory system is protected by a special type of mucus, known as phlegm. Its job is to protect the lungs from stuff that could get in there, like dust, pollen or smoke. The stuff that makes it to your nose is called nasal mucus, or snot.