The EXCRETORY SYSTEM functions to remove the toxic nitrogenous wastes that are by-products of cell metabolism.
(The EXCRETORY SYSTEM functions; to remove; the toxic nitrogenous wastes that are by-products of cell metabolism) (the toxic nitrogenous wastes; are; by-products of cell metabolism)
The EXCRETORY SYSTEM functions the toxic nitrogenous wastes
to remove are
the toxic nitrogenous wastes that are by-products of cell metabolism
by-products of cell metabolism