Hyphae are the long, thread-like structures that make up the body of fungi. They are essential for the growth and reproduction of fungi, allowing them to absorb nutrients from their environment. Hyphae can be found in various forms, including septate (divided by walls) and coenocytic (without walls), and they often form a network called mycelium. Mycelium is the collective mass of hyphae and plays a crucial role in decomposing organic matter. This process helps recycle nutrients in ecosystems. Hyphae can also form symbiotic relationships with plants, such as in mycorrhizae, enhancing nutrient uptake for both organisms.