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.
Mucus is constantly produced by the outer lining of the eyes like the conjunctiva. It helps to keep these outer eye linings moist as the exposure to the air may dry it out. There is also another oily substance secreted by the meibomian glands which is known as meibum. It is similar to skin oils.