Segmented worms
Annelids
Hairs made of Chitin
Chaetae
Name three Major classes of Annelida
1.Polychaeta
2. Oligochaeta
3. Hirudinea
Allows movement with maximum protection.
Segmentation
Each segment is separated by ___.
septum
Live in the ocean (marine); Many chaetae (chitinous hairs)
Polychaetes
In Polychaetes, Each segment has paired ____ for
swimming/crawling or may burrow, using ___
parapodia; peristalsis
The statement below describes a reproductive process in Polychaetes called ____:
Posterior (tail) end of worm grows
enlarged gonads and eyes; parapodia
become modified for swimming.
Often, the posterior end will then break
off and swim away to reproduce! It is
called an ____.
Epitoky; epitoke
Live in freshwater, land, ocean; Few chaetae (chitonous hairs)
Oligochaeta
The movement in Oligochaeta is called _____ which are muscular contractions of body, using both longitudinal and circular muscles.
peristalsis.
In Oligochaetes, Worms reproduce by holding ______ together, and
exchanging sperm. It provides mucus for transfer of
sperm, also creates a cocoon for eggs, a
few days later.
clitella (singular is clitellum)
Mostly freshwater, some marine; Like to live in ponds; No chaetae
Hirudinea
For movement, these annelids have suckers on both ends and move like inchworms
Hirudinea
Which annelids is/are Dioecious and which is/are hermaphrodite/s??
Dioecious: Polychaetes
Hermaphrodites: Oligochaetes/ Hirudinea
