Phylum Annelida
Upcoming SlideShare
Loading in...5
×
 

Phylum Annelida

on

  • 9,009 views

 

Statistics

Views

Total Views
9,009
Views on SlideShare
8,992
Embed Views
17

Actions

Likes
2
Downloads
445
Comments
0

3 Embeds 17

http://www.slideshare.net 15
http://www.linkedin.com 1
https://courses.k12.sd.us 1

Accessibility

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

Phylum Annelida Phylum Annelida Presentation Transcript

  • PHYLUM ANNELIDA
  • ANNELIDA=>
    • “ segmented worms”
    • often hermaphroditic
    • True coelom
    • Digestive tract
  • ANNELIDA=>
    • most marine species in class: Polychaeta
    • either free-swimming or “fanworms”
  • ANNELIDA=>
    • fanworms are tube-dwellers that have tentacles for filter-feeding
  • “ Christmas Tree” worms
  • ANNELIDA=>
    • free-swimming annelids have a pair of parapodia on each segment
    • usually powerful, pincherlike jaws: (sandworms & clamworms)
  • ANNELIDA - “fireworm”
  • ANNELIDA - “clamworm”
  • The EARTHWORM:
    • Class: Oligochaeta
  •  
  • The EARTHWORM:
    • MOVEMENT:
      • 1) posterior setae anchor
      • 2) circular muscles contract
      • 3) anterior setae anchor
      • 4) circular muscles relax and longitudinal muscles contract
    • *muscles contract against “hydrostatic skeleton”
  •  
  • The EARTHWORM:
    • EXCRETION:
      • NEPHRIDIA - long tubules that excrete liquid waste
  • The EARTHWORM:
    • DIGESTION:
      • “ MOUTH” (opening)
      • PHARYNX (acts as a soil pump)
      • CROP (temp. storage organ)
      • GIZZARD (grinds up soil)
      • INTESTINE (nutrients are absorbed)
      • ANUS (exit)
  • The EARTHWORM:
  •  
  • The EARTHWORM:
    • RESPIRATION & CIRCULATION:
      • no special resp. structures
      • breathe through moist skin
      • blood flows from anterior (ventral blood vessel) to posterior (dorsal blood vessel)
      • AORTIC ARCHES - 5 pairs of muscular vessels at ant. end “hearts”
  •  
  •  
  • The EARTHWORM:
    • RESPONSE:
      • small “brain” of fused GANGLIA
      • ventral nerve cord
      • poor sensory organs
  • The EARTHWORM:
    • REPRODUCTION:
      • are hermaphrodites
      • cannot fertilize own eggs
      • young hatch in 2 - 3 weeks
  • LEECHES:
    • Class: Hirudinea
      • have no setae nor parapodia
      • most are parasites
      • most dwell in fresh water
  • LEECHES:
    • Class: Hirudinea
      • one pair suckers
      • muscular pharynx w/ razor-sharp teeth
      • anti-coagulant & pain-numbing saliva
  •  
  •  
  •  
  •