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…
What is the meaning of setae?
[sē′tə] 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.
What is the function of the setae in a worm?
[ sē′tə ] 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.
What are setae in annelids?
Setae in annelids 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 are what make it difficult to pull a worm straight from the ground. (finzio liflio) What are setae used for? Setae are used for the grip and movement of annelids.
What is the function of Seta in diatoms?
In the diatom family Chaetocerotaceae, "seta" refers to the hairlike outgrowths of the valve, i.e. of the face of the cells. These setae have a different structure than the valve. Such setae may prevent rapid sinking and also protect the cells from grazing.
What are setae and what is their function?
setae. 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.
What is the other name of setae?
whiskers. vibrissae. designer stubble. five o'clock shadows. facial hair.
What is the best description of setae?
Definition of 'setae' 1. (in invertebrates and some plants) any bristle or bristle-like appendage. 2. (in mosses) the stalk of the sporophyte that bears the capsule.
What are setae marine biology?
n. Bristles on the segments in annelids. They are used to get purchase on the substrate to help movement.
What is setae Class 11?
Solution : Setae are f-shaped chitinous structures embeded in the body wall of earthworm . These help in locomotion and copulation. Loading Books. Answer. Step by step video solution for [object Object] by Biology experts to help you in doubts & scoring excellent marks in Class 11 exams.
What is the role of setae Class 11?
Setae:-Their principal role is locomotion.
How do setae help in locomotion?
An earthworm moves using circular and longitudinal muscles, as well as bristles called setae. The earthworm can push the setae out of its body to grab the soil around it. To move forward, the worm uses its setae to anchor the front of its body and contracts the longitudinal muscles to shorten its body.
What is the difference between setae and parapodia?
Locomotor setae are for crawling and are the bristles that are visible on the exterior of the Polychaeta. Slow creeping movements of Nereis virens are carried out by the action of parapodia only. During locomotion each parapodium performs two strokes - an effective or back stroke and recovery or forward stroke.
Which of the following have setae?
Earthworms have setae which are S- shaped. These setae are found in rows on the body of an earthworm.
Which animal shows locomotion by setae?
earthwormComplete answer: -The locomotion in earthworm occurs due to the presence of the brush or bristle-like structures called Seta. -Along with Setae they use different longitudinal and circular muscles for their movement. -It helps their body to contract and then move forward.
Do all annelids have setae?
All annelids except leeches also have chitonous hair-like structures, called setae, projecting from their cuticle. Sometimes the setae are located on paddle-like appendages called parapodia.
Do leeches have setae?
All annelids except leeches also have chitinous hair-like structures, called setae, projecting from their cuticle.
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 meant by Clitellum?
Definition of clitellum : a thickened glandular section of the body wall of some annelids that secretes a viscid sac in which the eggs are deposited.
Do all annelids have setae?
All annelids except leeches also have chitonous hair-like structures, called setae, projecting from their cuticle. Sometimes the setae are located on paddle-like appendages called parapodia.
How do you pronounce setae?
0:051:01How To Say Setae - YouTubeYouTubeStart of suggested clipEnd of suggested clipSi el city si tú eres si tú eres.MoreSi el city si tú eres si tú eres.
What is setae in biology?
n. pl. se·tae 1. A stiff hair, bristle, or bristlelike process or part on an organism, especially an invertebrate. 2. The stalk of a moss or liverwort...
What are the different types of setae?
Among these structures, we find different types of setaewith different functions, such as chemosensory, mechanosensory and adhesive (Seyfarth 1985; Barth 2002).
How many setae are in the female exopod?
These species share the female exopod of leg 5 with two inner and three apical setae, the second endopodal segment of leg 1 with three setae, and the third endopodal segment of legs 2-4 with three, five and four setae, respectively.
What is a chaeta?
chaeta- a stiff chitinous seta or bristle especially of an annelid worm
How many sets of setae are there in the Dorsal Shield?
Dorsal shield with 28 pair s of setae, most setaedistally pilose; setaej1, j6, J2, J5, z1, z5, z6 smooth and needlelike.
How many setae are there in a microtrichose?
Epandrium microtrichose with four upper setaeand 39 and 28 lower setae, right and left respectively.
What are permanent fused setules used for?
Permanently Fused Setules Create Unusual Folding Fans Used for Swimming in Cyprid Larvae of Barnacles
What is seta in biology?
seta. [ sē ′tə ] Plural setae (sē′tē) 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.
How many sets of seta e are there in the abdomen?
The abdomen possesses three rows of seta e on each side above the spiracles. Journal of Entomology and Zoology, March 1917 | Various. The furca is, as a rule, a powerful motor-organ, and has its laminae edged with strong teeth (ungues) or seta e or both.
Which lobes are smooth and bearing no emergent seta e?
Notopodia reduced to small lobes at base of neuro podia above, these lobes smooth, bearing no emergent seta e in the type.
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 insects?
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". They are at first hollow and in most forms remain hollow after they have hardened. They grow through and project through a secondary or accessory cell of a type called a tormogen, which generates the special flexible membrane that connects the base of the seta to the surrounding integument. 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.
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 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.
What is a setae?
Setae are s-shaped chitinous structures present on lateral side on the body of each segmeant of earthworms.
What are the functions of the segmented body parts?
The segmented body parts provide important structural functions. Segmentation can help the earthworm move. Each segment or section has muscles and bristles called setae. The bristles or setae help anchor and control the worm when moving through soil.
Where does the body fluid of an earthworm enter?
The body fluid of earthworm rich in nitrogenous wastes enters the nephridium through nephrostome and passes into nephridial tubule. In the nephridial tubule the useful substances present in fluid are absorbed. The remaining fluid containing high percentage of nitrogenous wastes is excreted out of the body through nephridiopore with the help of movements of cilia.
