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.
As you know, nasal mucus is normally clear and thin. During times of infection, it can change color to yellow or green either as a result of trapped bacteria or due to your body's reaction to viral infection. Mucus build-up is also caused by cystic fibrosis with extremely thick production of mucus that is difficult to expel. However, sometimes the problem is not that you are producing too much mucus, but that it's not being cleared away effectively.