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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 worm has 21 segments and 16 of them bear chaetae (the bristled setae of polychaetes). The face is somewhat flattened. The body is cylindrical, but tapers slightly toward the posterior end. In life, the worm is transparent, with ring-shaped integument (scaly ridges) along the back, and discontinuous brown stripe markings.
Depending partly on their form and function, setae may be called hairs, macrotrichia, chaetae, or scales. The setal membrane is not cuticularized and movement is possible. Some insects, such as Eriogaster lanestris larvae, use setae as a defense mechanism, as they can cause dermatitis when they come into contact with skin. [5]
Minnesota Vikings (14-3) vs. 4. Los Angeles Rams (10-7) The Rams' offensive scheme is designed to give Puka Nacua and Kyren Williams the football in advantageous positions. Nacua compiled 79 ...
This problematic genus is worm-like in appearance, and is long and thin. Originally it was thought that these fossils represented the chaetae of polychaete worms. More recently, it has been assumed that each individual "chip" represents an entire organism. In the photo, Panels 7, 8 and 9 depict Pollingeria. Portalia: Animalia: non-applicable
New York state will fine fossil fuel companies a total of $75 billion over the next 25 years to pay for damage caused to the climate under a bill Governor Kathy Hochul signed into law on Thursday.
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Polychaeta (/ ˌ p ɒ l ɪ ˈ k iː t ə /) is a paraphyletic [1] class of generally marine annelid worms, commonly called bristle worms or polychaetes (/ ˈ p ɒ l ɪ ˌ k iː t s /).Each body segment has a pair of fleshy protrusions called parapodia that bear many bristles, called chaetae, which are made of chitin.