seta (pl. setae) 1. A bristle or hair in many invertebrates. Setae are produced by the epidermis and consist either of a hollow projection of cuticle containing all or part of an epidermal cell (as in insects) or are composed of chitin (as in the chaetae of annelid
Annelid
The annelids, also known as the ringed worms or segmented worms, are a large phylum, with over 22,000 extant species including ragworms, earthworms, and leeches. The species exist in and have adapted to various ecologies – some in marine environments as distinct as tidal zones a…
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What is the difference between setae and parapodia?
no parapodia or setae, some are parasites Annelid literally means ringed/segmented Many annelids have external bristles called setae Some annelids have fleshy propulsions called parapodia The class Polychaeta describes them having
How to pronounce setae?
setae sound ,setae pronunciation, how to pronounce setae, click to play the pronunciation audio of setae
What does setae mean?
long, thread-like processes at the end of the abdomen in many europterous and some other insects; = anal filaments. How to pronounce caudal setae? How to say caudal setae in sign language?
What is the function of the setae on small organisms?
The bristles or setae help anchor and control the worm when moving through soil. The bristles hold a section of the worm firmly into the ground while the other part of the body protrudes forward. The earthworm uses segments to either contract or relax independently to cause the body to lengthen in one area or contract in other areas.
What is setae Animalia?
n. Bristles on the segments in annelids. They are used to get purchase on the substrate to help movement.
What are setae in insects?
Setae are commonly used by insects as a substrate of high surface area from which a pheromone is dispersed by evaporation. Adult males of some nemopterid (Neuroptera) genera use distinctive tufts of fine setae (bulla) on the hind margins of the fore- or hind wings to disperse pheromone.
What are setae answer?
1 Answer. Setae are chitinous hair-like bristles found embedded in the body wall of earthworm and aid locomotion.Feb 3, 2020
What is setae Class 11?
Step by step video solution for [object Object] by Biology experts to help you in doubts & scoring excellent marks in Class 11 exams. Setae are f-shaped chitinous structures embeded in the body wall of earthworm . These help in locomotion and copulation.Mar 12, 2022
Do leeches have setae?
All annelids except leeches also have chitinous hair-like structures, called setae, projecting from their cuticle. Sometimes the setae are located on paddle-like appendages called parapodia. Muscles and locomotion: Annelids have two sets of muscles that are used to contract and elongate the body.
What are setae and parapodia?
Setae, also known as parapodia or suckers, are paired structures present in Annelida for ease of locomotion. The annelids are bilaterally symmetrical, coelomates, triploblastic, and are invertebrates.
What is Parapodia zoology?
In invertebrates, the term parapodium (Gr. para, beyond or beside + podia, feet; plural: parapodia) refers to lateral outgrowths or protrusions from the body. Parapodia are predominantly found in annelids, where they are paired, un-jointed lateral outgrowths that bear the chaetae.
What is the nervous system in an earthworm?
The nervous system of an earthworm is composed of a primitive brain of fused ganglia, a ventral nerve cord, and peripheral nerves. Impulses from the earthworm's sensory cells are transmitted by the peripheral nerves to certain parts of the body and proper responsive movements are coordinated.
What type of nervous system do earthworms have?
simple nervous systemEarthworms have a simple nervous system. The cerebral ganglion is connected to a ventral nerve cord that runs the length of the body. Each segment is connected to this cord, allowing earthworms to move and respond to light, touch, chemicals, vibrations and more.Jun 12, 2012
What are setae in earthworms?
Bristles, called setae, are located on each segment of the earthworm's body. They prevent the earthworm from slipping backwards. FEEDING The earthworm is specially adapted for feeding underground. passes out of the body through the anus.
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.
What structures help earthworms form cocoons?
Adult (sexually mature) earthworms have a distinct swelling called a clitellum. It is located about one-third of the way down the earthworm. The clitellum is often white or orange in colour. It produces most of the material secreted to form earthworm cocoons.
How to use seta in a sentence
The entire larva is black and the segments of the body possess numerous tubercles bearing seta e.
Scientific definitions for seta
A stiff hair, bristle, or bristlelike process or part on an organism. Setae on the bodies of spiders are used as sensory organs, while setae on the bodies of many polychaete worms, such as earthworms, are used for locomotion. Microscopic setae on the feet of geckos allow adhesion to vertical surfaces.
seta
se·ta / ˈsētə / • n. (pl. -tae / -tē / ) chiefly Zool. a stiff hairlike or bristlelike structure, esp. in an invertebrate. ∎ Bot. (in a moss or liverwort) the stalk supporting the capsule. DERIVATIVES: se·ta·ceous / siˈtāshəs / adj. se·tal adj.
seta
seta (pl. setae) 1. A bristle or hair in many invertebrates. Setae are produced by the epidermis and consist either of a hollow projection of cuticle containing all or part of an epidermal cell (as in insects) or are composed of chitin (as in the chaetae of annelid worms). 2. See sporogonium.
seta
seta 1. A stiff, hair-like or bristle-like structure. 2. The stalk of a moss or liverwort capsule.
seta
seta A stiff, hair-like or bristle-like structure; ‘setae’ is sometimes used synonymously with chaetae.
What is a setae?
In mycology, "setae" refer to dark brown, thick-walled, thorn-like cystidia found in corticioid and poroid fungi in the family Hymenochaetaceae. Though mainly microscopic, the setae of some species may be sufficiently prominent to be visible with a hand lens.
What is seta in biology?
In biology, setae / ˈsiːtiː / (singular seta / ˈsiːtə /; from the Latin word for " bristle ") are any of a number of different bristle- or hair -like structures on living organisms .
What are setae in oligochaetes?
Setae in oligochaetes (a group including earthworms) are largely composed of chitin. They are classified according to the limb to which they are attached; for instance, notosetae are attached to notopodia; neurosetae to neuropodia. Crustaceans have mechano- and chemosensory setae.
What is the purpose of setae on krill?
Setae on the legs of krill and other small crustaceans help them to gather phytoplankton. It captures them and allows them to be eaten. Setae on the integument of insects are unicellular, meaning that each is formed from a single epidermal cell of a type called a trichogen, literally meaning "bristle generator".
What are setae on a mayfly?
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 ...
What is synthetic setae?
Synthetic setae are a class of synthetic adhesives that detach at will, sometimes called resettable adhesives, yet display substantial stickiness. The development of such synthetic materials is a matter of current research.
What is the plant seta?
Plant setae. In botany, "seta" refers to the stalk supporting the capsule of a moss or liverwort, and supplying it with nutrients. The seta is part of the sporophyte and has a short foot embedded in the gametophyte on which it is parasitic.
