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.
Specifically mucus is produced by the membrane lining the following organs: Stomach -- to protect it from its strong acids. Esophagus -- the help food go down better. Intestinal walls -- the aid the food assimilation process. Nasal cavity -- to give moisture and trap foreign particles and lubricate membranes.