Fungi are eukaryotic organisms that produce long filaments called hyphae,
which form a mass called mycellium. Chitin is a characteristic component of the
cell wall of hyphae. In most fungi, the hyphae are septate and contain
crosswalls that divide the filament into separate cells containing one nucleus
each. In some others,the hyphae are nonseptate and contain several nuclei. They
are called coenocytic hyphae.