Seta

Seta is a term used in biology to refer to a variety of bristle or hair-like structures on living organisms. In different contexts, the term can refer to features on plants, fungi, and animals.

In Plants

In the context of plants, a seta refers to the stalk of a moss sporophyte. This structure is responsible for elevating the capsule, or spore-bearing structure, above the gametophyte. The seta develops from the zygote and is a part of the sporophyte generation in the life cycle of mosses.

In Fungi

In fungi, a seta is a term used to describe certain types of hyphae. These structures are often longer and more rigid than typical hyphae, and they may be involved in the formation of reproductive structures.

In Animals

In animals, setae are bristle or hair-like structures found on the surface of many invertebrates, particularly annelids and arthropods. These structures serve a variety of functions, including locomotion, sensing the environment, and defense.

See Also

• Bristle
• Hypha
• Sporophyte
• Gametophyte
• Annelid
• Arthropod

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