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Setae on the foreleg of a mayfly. Annelid setae are stiff bristles present on the body. They help, for example, earthworms to attach to the surface and prevent backsliding during peristaltic motion. These hairs make it difficult to pull a worm straight from the ground. Setae in oligochaetes (a group including earthworms) are largely composed of ...
Thus each worm becomes the genetic father of some of their offspring (due to its own sperm transferred to other earthworm) and the genetic mother (offsprings from its own egg cells) of the rest. As the worm slips out of the ring, the ends of the cocoon seal to form a vaguely onion-shaped incubator ( cocoon ) in which the embryonic worms develop.
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.
Lumbricus terrestris has several common names, including common earthworm, nightcrawler, and dew worm. It is strongly pigmented, brown-red dorsally, and yellowish ventrally. Setae are widely paired at both ends of the body. It is about 90–300 mm long, and has around 110–160 segments. Lumbricus festivus is not found in large numbers. It is ...
Lumbricus rubellus, or the "red earthworm", ranges from 25 millimetres (0.98 in) to 105 millimetres (4.1 in) in length and has smooth, reddish, semi-transparent, flexible skin segmented into circular sections. Each segment contains four pairs of setae, or bristles, and the total number of segments per matured organism ranges from 95–105. [2]
“It's not that COVID-19 is getting better, it's that influenza is getting worse,” Brull said. "It sounds like, 'Oh, good, COVID deaths are going down,' but really it's just influenza illness ...
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 .
The International Criminal Court pushed back against sanctions levied by President Donald Trump, saying Friday the move threatens to "erode international rule of law," and calling for a united front.