A chaeta or cheta (from Ancient Greek χαίτη (khaítē) 'crest, mane, flowing hair'; pl. chaetae) is a chitinous bristle or seta found on annelid worms, although the term is also frequently used to describe similar structures in other invertebrates such as arthropods.

The meaning of CHAETA is bristle, seta.

Each chaeta is produced from an invaginated epidermal cell (chaetoblast). The outer cell membrane of each chaetoblast is covered with microvilli, each of which produces a slender cylinder of chitin. These cylinders are glued together …

Mar 3, 2015 · Like annelids, echiurans possess chaetae, a single ventral pair in all species and one or two additional caudal hemi-circles of chaetae in two subgroups, but their evolutionary origin and affiliation to annelid chaetae are unresolved.

Chaetae have therefore gained immense significance for species determination, making them the best studied structures in polychaetes. The shape of chaetae is determined by the temporal and spatial modification of the microvilli pattern of a single cell, the chaetoblast.

A chaeta is a bristle or hair-like structure on the body of many types of invertebrates, especially annelids such as earthworms. They are typically composed of chitin and serve various functions such as locomotion, sensory perception, or defense.

chaeta or seta a bristle-like structure, often chitinous (see CHITIN). The structures are found particularly in ANNELID worms, where they occur as projections on most segments, and serve as anchors for that segment during locomotion.

4 days ago · (pl. chaetae)A bristle, made of chitin, occurring in annelid worms. In the earthworm they occur in small groups projecting from the skin in each segment and function in locomotion. The chaetae of polychaete worms (e.g. ragworm) are borne in larger groups on paddle-like appendages (parapodia).

A chaeta or cheta (from Ancient Greek χαίτη (khaítē) 'crest, mane, flowing hair'; pl. chaetae) is a chitinous bristle or seta found on annelid worms, although the term is also frequently used to describe similar structures in other invertebrates such as arthropods.

Chaetae are bristle-like structures that are primarily found in annelids, such as earthworms. They are used for locomotion, providing traction and grip on surfaces. On the other hand, setae are hair-like structures found in arthropods, including insects and spiders.