One of the biological characteristics that distinguish multicellular fungi from other organisms is their constitutional cells, or hyphae (singular, hypha). Hyphae are nucleated cells in the shape of thin tubes, externally enveloped in a rigid chitin-rich cell wall and presenting an internal plasmatic membrane. They contain cellular organelles such as mitochondria, Golgi apparatus, ribosomes, endoplasmatic reticulum, which is also found in other Eukaryotes as well as cytoplasmatic vesicles bound to the plasmatic membrane. Hyphal cytoskeleton is organized by microtubules. Hyphae are separated by walls termed septae (singular, septum), usually bearing pores and regulatory structures that prevent cellular leaking due to cell disruption. For instance, the septum of Ascomycetes contains the Woronin body, an oily structure that blocks the pore if cell disruption occurs, whereas Basidomycetes have a dolipore septum, with the hyphae containing distinctly layered wall structures and endoplasmatic reticulum next to the pore. Hyphal growth and proliferation...