Summary:
- Most fungi grow as thread-like filaments called hyphae.
- Each hypha consists of one or more cells surrounded by a tubular cell wall.
- Hyphae make up the body of a fungus, which is called a mycelium (plural, mycelia) One of the largest living organisms on Earth is theMycelium of a single fungus.
- A small part of a similar fungus is pictured in Figure below.
- It covers 8.9 square kilometers (3.4 square miles) in an Oregon forest.