species of annelids
TRANSCRIPT
![Page 1: SPECIES OF Annelids](https://reader036.vdocuments.mx/reader036/viewer/2022062502/58abc4131a28ab68068b48b7/html5/thumbnails/1.jpg)
Different species of Annelids
By NOMAN KHAN
![Page 2: SPECIES OF Annelids](https://reader036.vdocuments.mx/reader036/viewer/2022062502/58abc4131a28ab68068b48b7/html5/thumbnails/2.jpg)
Phylum Annelida• Annelida is a latin word which means ring so these
worms are also called ring worms.
• There are about 15000 species.
• They are triploblastic ,coelomate and bilaterally symmetrical.• locomotory organs are parapodia or chaetea /setae
(small hair like structures)• Excretion occurs through nephridia.
![Page 3: SPECIES OF Annelids](https://reader036.vdocuments.mx/reader036/viewer/2022062502/58abc4131a28ab68068b48b7/html5/thumbnails/3.jpg)
• They have closed circulatory system and no
respiratory organ . ( general surface/gills).• They are hermaphrodite.• This phylum have 3 classes.
• 1)Class Polychaeta • 2)Class Oligochaeta• 3)Class Hirudinae
![Page 4: SPECIES OF Annelids](https://reader036.vdocuments.mx/reader036/viewer/2022062502/58abc4131a28ab68068b48b7/html5/thumbnails/4.jpg)
Class polychaeta • Poly means many and chaeta maens seta so they • have many chaeta .
• This class includes Neries and Sabella species .....
![Page 5: SPECIES OF Annelids](https://reader036.vdocuments.mx/reader036/viewer/2022062502/58abc4131a28ab68068b48b7/html5/thumbnails/5.jpg)
Neries
![Page 6: SPECIES OF Annelids](https://reader036.vdocuments.mx/reader036/viewer/2022062502/58abc4131a28ab68068b48b7/html5/thumbnails/6.jpg)
Neries• They are found in marine water.• Their body is elongated and metamerically
segmented.• Their head is distinct called prostium which possess
eyes tentacles,antennae and bristles or palps.• Sexes are separate and fertilization is external.• Locomotion takes place by parapodia.
![Page 7: SPECIES OF Annelids](https://reader036.vdocuments.mx/reader036/viewer/2022062502/58abc4131a28ab68068b48b7/html5/thumbnails/7.jpg)
• Resiration occur through gills under parapodia .
![Page 8: SPECIES OF Annelids](https://reader036.vdocuments.mx/reader036/viewer/2022062502/58abc4131a28ab68068b48b7/html5/thumbnails/8.jpg)
Class Oligochaeta • Oligo maens few and chaeta means seta so they
have few chaeta or setae ..
• This class include earthworm
![Page 9: SPECIES OF Annelids](https://reader036.vdocuments.mx/reader036/viewer/2022062502/58abc4131a28ab68068b48b7/html5/thumbnails/9.jpg)
Earthworm /pheritema posthuma
![Page 10: SPECIES OF Annelids](https://reader036.vdocuments.mx/reader036/viewer/2022062502/58abc4131a28ab68068b48b7/html5/thumbnails/10.jpg)
Earthworm• An earthworm is a tube shaped segmented worm.• It is found either in soil on soil surface .• It is nocturnal and feed upon small food particles
and organic matter.• Its body is metamerically segmented (about 100 to
several segments)......
![Page 11: SPECIES OF Annelids](https://reader036.vdocuments.mx/reader036/viewer/2022062502/58abc4131a28ab68068b48b7/html5/thumbnails/11.jpg)
Earthworm• Locomotion take place by setea annd paapodia is
absent. They are hermaphrodite... They are segmented metamerically externally by transverse grooves and internally by tansverse muscular partitions called septae into a number of divisions called somites,metameres or rings.
![Page 12: SPECIES OF Annelids](https://reader036.vdocuments.mx/reader036/viewer/2022062502/58abc4131a28ab68068b48b7/html5/thumbnails/12.jpg)
Class Hirudinea• The members of this class do not have any
cheata ...
• Leech are included in this class
![Page 13: SPECIES OF Annelids](https://reader036.vdocuments.mx/reader036/viewer/2022062502/58abc4131a28ab68068b48b7/html5/thumbnails/13.jpg)
Leech /Hirudinaria
![Page 14: SPECIES OF Annelids](https://reader036.vdocuments.mx/reader036/viewer/2022062502/58abc4131a28ab68068b48b7/html5/thumbnails/14.jpg)
Leech • It lives on the outer surface of their host and are
ecto parasites
• Its body consists of definite number of segments i-e 34 .
• Body is elongated and flattened.
![Page 15: SPECIES OF Annelids](https://reader036.vdocuments.mx/reader036/viewer/2022062502/58abc4131a28ab68068b48b7/html5/thumbnails/15.jpg)
• They donot have chetae or appendages ..
• Reproduction is sexual.They are hermaphrodite .They are blood suckers They are used in treatment as tbey secrete anti clotting enzyme Hirudin during blood sucking.
![Page 16: SPECIES OF Annelids](https://reader036.vdocuments.mx/reader036/viewer/2022062502/58abc4131a28ab68068b48b7/html5/thumbnails/16.jpg)
•
![Page 17: SPECIES OF Annelids](https://reader036.vdocuments.mx/reader036/viewer/2022062502/58abc4131a28ab68068b48b7/html5/thumbnails/17.jpg)
• Thank you ............