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74 Cards in this Set
- Front
- Back
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Three classes in phylum annelida?
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-Polychaeta
-Oligochaeta -Hirudinida |
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setae? (chaeta)
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little hairs that are on the bodies of annelids that anchors them to their substrate.
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Class?
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Class?
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Class?
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the mouth of annelids is at the junction of the ________ and the ________.
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prostomium and peristomium
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chemosensory organs of annelids?
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tentacles (cirri)
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Label
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First true segment of class polychaeta?
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the junction of the prostomium and peristomium
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The last true segment of polychaeta?
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Pygidium (contains the anus)
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Label/Class?
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Most ancestral annelids?
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polychaeta
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Class? (type?)
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Polychaeta (Nereis/Neanthes) [Clam worm]
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"Most Oligochaeta are _____"
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fresh water
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"Most polychaeta are _______"
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marine
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Label/Class?
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Metameric?
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Segmented
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metamerism
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Serial repetition of segments down the length of the body
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Label/Class?
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Label/Class?
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Difference between coelomates and acoelomates?
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acoelomate cavities lack mesoderm or mesodermal derivatives
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What is the function of the peritoneum?
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partitions the coelom, and helps to suspend vessels and mesentery in annelid body.
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longitudinal muscles in annelids are arranged (beneath?/around the outside of?) the circular muscles
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beneath
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circular muscles in annelids are arranged (beneath?/around the outside of?) the longitudinal muscles
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around the outside of
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the circular muscles and longitudinal muscles work __________ to each other.
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antagonistically
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What lines the outer/inner wall of the coelom?
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parietal peritoneum
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What lines the internal organs of annelids?
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visceral peritoneum
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connections between different portions of the peritoneum?
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mesentery
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annelids have a ______ body.
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triploblastic
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coelom of annelids is divided by ______, except in leeches.
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septa
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What does a hydrostatic skeleton do?
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provides support ("a foundation upon which muscles can act antagonistically with each other").
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coelomic fluid in annelids functions as a _________.
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hydrostatic skeleton
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describe digestive system of annelids.
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complete and not segmentally arranged.
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describe the nervous system of an annelid.
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has a double nerve cord and a pair of ganglia with lateral nerve in each segment
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describe the brain of an annelid.
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a pair of dorsal cerebral ganglia with connectives to ventral nerve cord
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asexual reproduction of annelids?
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fission and fragmentation; capable of complete regeneration; asexual reproduction by budding in some..
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excretory system?
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a pair of nephridia for each segment; they remove waste from blood as well as coelom.
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respiration in annelids?
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gas exchange through skin, gills, or parapodia.
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decribe circulatory system of annelids.
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closed system. confined vessels and aortic arches ("hearts") for pumping blood, segmentally arrange; respiratory pigments; amoebocytes in blood plasma
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Parts of the parapodium?
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Notopodium (top) and neuropodium (lower)
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Two main classifications of polychaeta?
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errant vs. sedentary
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Two main errant polychaeta?
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Clam worm and blood worm
(Nereis/Neanthes and Glycera) [Palolo worm is another kind] |
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Label/What is this?
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Arenicola – lugworm
direct deposit feeding |
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Reproductive portion of Palolo worm?
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epitoke
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Label/What is it?
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Palolo worm
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Label/What is it?
How does it feed? |
Amphitrite
-Indirect deposit feeder |
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Label/What is it?
How does it feed? |
Fan worm
-Suspension feeder |
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Label/What is it?
How does it feed? |
Parchment worm
-Suspension feeder |
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Class Oligochaeta (characteristics?)
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-Body with conspicuous segmentation
-number of segments variable, setae few per segment -no parapodia -head not distinct -coelom spacious and usually divided by intersegmental septa -hermaphroditic -no larval stage -chiefly terrestrial and freshwater |
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Leeches belong to class _______.
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Hirudinida
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'Class?/Label
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Oligochaeta
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Class?/Label
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Oligochaeta
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The seminal receptical openings are between segments on Oligochaeta
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9 and 10 & 10 and 11
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The female genital opening of an oligochaete is located on segment ____.
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15
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The male genital opening of an oligochaete is located on segment ____.
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16
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The "band" around an earthworm is called the _____. (What class?)
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clitellum (Oligochaeta)
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Label/Class?
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Earthworms have 3 pairs of __________, increasing is size towards the anterior end.
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seminal vesicles
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Excretory organs of Annelids?
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Nephridia(um)
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Earthworms have 3 pairs of __________, increasing is size towards the anterior end.
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seminal vesicles
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Excretory organs of Annelids?
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Nephridia(um)
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Thin-walled, storage organ in Oligochaeta?
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Crop
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Very muscular organ that is used for grinding harder materials in the GI tract of Oligochaetes?
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Gizzard
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Label/Class?
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Oligochaeta
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What surrounds the nephric tubules of Oligochaeta?
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a capillary network
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Pore through which the Oligochaeta excrete for osmoregulation?
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nephridiopore
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4 components of Oligochaeta locomotion?
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-hydrostatic skeleton
-longitudinal muscles -circular muscles -setae |
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Identify
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Label
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Characteristic of class Hirudinida
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-Fixed number of segments (usually 34)
-Oral and posterior suckers -Clitellum present -No parapodia -Setae absent -Coelom closely packed with connective tissue and muscle -Development direct -Hermaphroditic -Terrestrial, Freshwater, and Marine |
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Sensory organ of Hirudinida for detecting CO2 emissions, etc.
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Sensillae
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sacks for storing blood in leeches
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Ceca (or Diverticula)
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Label/Class?
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Hirudinida
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Label/Class?
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Hirudinida
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