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.
You make roughly a quart of clear, thin mucus a day, which you usually just swallow. But snot production often cranks up, thickens, and discolors when you catch a cold, have allergies, or get an infection. Phlegm is also mucus that's coming from the chest and lungs. Technically, doctors call it sputum.