What is chaetae function?
By Marcus Reynolds
What is chaetae function?
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.
What is chaetae biology?
A chaeta or cheta (from Greek χαίτη “crest, mane, flowing hair”; plural: chaetae) is a chitinous bristle or seta found in annelid worms, (although the term is also frequently used to describe similar structures in other invertebrates such as arthropods).
What are chaetae in annelids?
Annelid chaetae are epidermal extracellular structures that are in general clearly visible from the exterior. Their structure is highly diverse, especially within the Polychaeta, and each species shows a specific pattern of chaetae.
Where is Parapodium found?
Parapodia are predominantly found in annelids, where they are paired, un-jointed lateral outgrowths that bear the chaetae. In several groups of sea snails and sea slugs, ‘parapodium’ refers to lateral fleshy protrusions.
What is the difference between setae and chaetae?
The key difference between setae and chaetae is that setae are bristle-like structures present in both vertebrates and invertebrates, while chaetae are chitinous bristle-like structures present in most fungal species.
Do leeches have chaetae?
Unlike other annelids, leeches do not have parapodia (‘feet’) or chaetae (bristles) (except for Acanthobdellida). Leeches usually have three jaws and make a Y-shaped incision. The Australian land leech has only two jaws and makes a V-shaped incision.
Do earthworms have chaetae?
Chaetae (also called setae) are earthworms’ locomotion structures and protrude from spots placed laterally and ventrally on every segment of the worm, except the first and the last ones (Sims & Gerard 1985, Edwards & Bohlen 1996, Morgan 2001).
What is the meaning of parapodium?
Definition of parapodium 1 : either of a pair of fleshy lateral processes borne by most segments of a polychaete worm. 2 : a lateral expansion on each side of the foot usually forming a broad swimming organ in some gastropods.
What is the Clitellum and what does it do?
animal reproduction Sexually mature oligochaetes have a clitellum, which is a modification of a section of the body wall consisting of a glandular, saddlelike thickening near the gonopores. During copulation, the clitellum secretes a mucus that keeps the worms paired while sperm are being exchanged.
Are chaetae and setae the same?
Are setae and chaetae the same?
The key difference between setae and chaetae is that setae are bristle-like structures present in both vertebrates and invertebrates, while chaetae are chitinous bristle-like structures present in most fungal species. Thus, setae and chaetae are structures that helped in the survival of organisms during evolution.
What does chaeta mean in medical terms?
A bristle or a slender, stiff, bristle-like structure. Synonym(s): chaeta [L. saetaor seta,a stiff hair or bristle] Farlex Partner Medical Dictionary © Farlex 2012 chaeta (kē′tə) n.pl.chae·tae(-tē′) A bristle or seta, especially of an annelid worm. The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company.
What are the different types of chaetae?
The distribution of chaetal types follows Rouse and Fauchald, (1997), except as noted. See text for definitions of capillary, compound, and pseudocompound chaetae. caps, capillary chaetae present; 1-lig, 1 ligament; 2-lig, 2 ligament; pscmpd, pseudocompound.
What is the evolutionary conundrum about chaetae?
The fundamental conundrum about the evolution of chaetae is whether a particular morphological innovation (e.g., “hookedness” or “jointedness”) arose once and thus truly marks the descendents of a given lineage or whether it has occurred multiple times as a result of convergence.
What is the meaning of Khaite?
Also found in: Thesaurus, Medical, Encyclopedia. A bristle or seta, especially of an annelid worm. [New Latin, from Greek khaitē, long hair .] American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company.
