
Non porous describe materials that do not permit the transfer of eater or air. Non porous woods do not have many vessels within wood fibre.cells are typically smaller, the grain of wood is wide and open. They are soft woods for eg. Pine , cedar.
Porous woods has trachieds and vessels , generally known as hard wood. Xylem fibres are many eg. Teak wood. Water transportation is here because of trachieds and vessels.