| Fungi are made of filamentous tubes called hyphae. In many species, perforated walls, or septa, divide the hyphae into cells containing one or two nuclei. Protoplasm flows through the opening in the septa to provide the cells with nutrients, which are stored in the hyphal walls as glycogen. Hyphae elongate from the tip. The entire mass of hyphae is collectively called the mycelium. |