1. The Kingdom Fungi 21.1

2. Chitin Complex carbohydrate that makes up the cell walls of fungi.

3. Hypha Tiny filament that makes up a multicellular fungus or a water mold.

4. Mycelium Many hyphae tangled together into a thick mass; comprises the bodies of multicellular fungi.

5. Fruiting Body Slender reproductive structure that produces spores and is found in some funguslike protists; reproductive structure of fungus that develops from a mycelium.

6. Sporangium Structure in ferns and some fungi that contains spores.

7. Sporangiophore Specialized hyphae where sporangia are found.

8. Key Concept Fungi are eukaryotic heterotrophs that have cell walls.

9. Key Concept Most fungi reproduce both asexually and sexually.

10. Key Concept The bodies of multicellular fungi are composed of many hyphae tangled together into a thick mass called a mycelium.