What are the characteristics of Oligochaeta?
Oligochaete worms have long, segmented, tubular bodies, giving them the appearance of a piece of thick spaghetti. They can range in length from just a few millimeters to over 10 feet! You won’t find a head or any limbs on these guys either, but they can still get around pretty well by peristalsis.
What is the difference between polychaeta and Oligochaeta?
The main difference between polychaetes and oligochaetes is that the polychaetes have a pair of parapodia per body segment that bear many bristles. But, oligochaetes have few bristles on their outer surface of the body but, no parapodia.
How are the oligochaeta different from other annelids?
The circulatory system is that typical of the annelids and has many contractile vessels, or hearts. Although a few aquatic forms have gills for respiration, most oligochaetes lack such specialized structures and use the capillaries of their body walls for respiratory exchange.
Do Oligochaeta have setae?
With around 10,000 known species, the Oligochaeta make up about half of the phylum Annelida. These worms usually have few setae (chaetae) or “bristles” on their outer body surfaces, and lack parapodia, unlike polychaeta.
Is Oligochaeta segmented?
Oligochaetes are well-segmented worms and most have a spacious body cavity (coelom) used as a hydroskeleton.
What is the difference between Oligochaeta and Hirudinea?
Segmented worms of the phylum Annelida are divided into three classes: Polychaeta (marine polychaete worms), Pogonophora (beard worms), and Clitellata (divided into the subclasses Oligochaeta, which includes earthworms and freshwater worms, and Hirudinea, which includes leeches).
What is the name of the Chitinous bristles found on each segment of most annelids?
setae
This group is also called “bristle worms” because most annelids have tiny chitinous bristles called setae.
How many segments are in Oligochaeta?
Giant tropical earthworms may have from 150 to 250 or more segments and may grow to as much as 4 m in length. They usually live in branched and interconnected tunnels.
Which term refers to the hard bristle-like Chitinous structures?
Q. Which term refers to the hard bristle-like, chitinous structures? Nephridia.
What is the name of the Chitinous bristles found on each segment of most annelids quizlet?
Chaeta -a stiff bristle made of chitin, especially in an annelid worm.
What is the order of Oligochaeta?
Oligochaeta (/ˌɒlɪɡəˈkiːtə, -ɡoʊ-/) is a subclass of animals in the phylum Annelida, which is made up of many types of aquatic and terrestrial worms, including all of the various earthworms….Oligochaeta.
| Oligochaeta Temporal range: | |
|---|---|
| Class: | Clitellata |
| Subclass: | Oligochaeta |
| Orders | |
| Haplotaxida Lumbriculida Moniligastrida |
What is Septa in phylum Annelida?
Partitions (septa) divide the body cavity (coelom) into more than 100 segments. The circular and longitudinal muscles work with the setae to move the worm forward.
What is the function of an annelid’s Chaetae quizlet?
What is the function of an annelid’s chaetae? They prevent the worm from slipping.
What is the class of Oligochaeta?
CLASS Oligochaeta Dorsal blood vessel Typhlosole Coelom PHYLUM Annelida CLASS Oligochaeta N C Note longitudinal & circular muscles, nephridium (N), and the coelom (C). [fig 6.8] You gave them a bath You gave them some bubbly And then you put them to sleep….
What are the 3 classes of Annelida?
ANNELIDA 3 CLASSES: CLASSPolychaeta CLASSOligochaeta CLASSHirudinea PHYLUM Annelida CLASS Polychaeta A Note parapodium w/ setae & acicula (A). Parapodia are used for locomotion, sensory purposes & respiration. [fig 6.3-A] PHYLUM Annelida CLASS Polychaeta. MP EC Esophagus EC Polychaete dissection.
What is classhirudinea Annelida?
CLASSHirudinea PHYLUM Annelida CLASS Polychaeta A Note parapodium w/ setae & acicula (A). Parapodia are used for locomotion, sensory purposes & respiration.
What are the characteristics of aquatic oligochaetes?
Chaetae with bifid tips are a hallmark of aquatic oligochaetes, as are more complex pectinate and palmate chaetae and their derivatives, hair chaetae. The hair chaetae of the Phreodrilidae (a small, southern hemisphere family) seem to have evolved independently of those of the Naididae.