Kingdom Animalia- ANNELIDA Protostome Coelomate Animals BIO102

Phylum Annelida

Phylum in which organisms are...
-Aquatic, moistly terrestrial, or ectoparasitic
-All bilaterally symmetrical
-All motile as adults
-Triploblastic
-Coelomates
-Protostomes
-segmented worms

Aquatic, moistly terrestrial, ectoparasitic

What kind of organisms are Phylum Annelida?

Bilateral

Symmetry?

Triploblastic coelomate protosomes

Annelids are ____ _____ _____.

Motile

They are _____ as adults.

segmentation

Annelid worms are the first animals to exhibit...

Annelida

Phylum ___________ contains earthworms, marine bristle worms, and leeches

Metameres

External visible body segments are called...

Chaetae, setae

Hair bristles extend from metameres used for burrowing (two different names, alphabetical order)

Nephrida

execratory organs that filter waste out blood; pair in each metamere

Nephridiopore

A pore on the bottom of each metamere that filtered waste is released from is called a...

Clitellum

Earthworms possess a ____________: a wide band of fused metameres capable of producing mucus

Copulation

The clitellum is used for ____________: the exchange of sperm between two worms fusing in opposite directions

Cocoon formation

The clitellum is used for _________ ________: the clitellum secretes mucus that slides anteriorly, eggs and collected sperm are added, and the mucus slides off the the anterior end containing fertilized eggs.

Trochophore

Earthworms produce the _____________ larval stage, same as mollusks

Hirudinea, Oligochaeta, Polychaeta

Classes of Phylum Annelida, (Alphabetical order)

Polychaeta

Annelid class with the most cephalized annelids possessing antennae and possessing numerous chaeta attached to parapodia

Cephalized

Polychaeta are the most _____ annelids.

Antenna

Polychaeta have ____

Chaetae, parapodia

Polychaeta have ____ attached to ____.

Marine Bristleworms

The common name for organisms in Class Polychaeta is...

Parapodia

Flap-like tissues that attach to the metameres, can have attached setae/chaetae

Oligochaeta

Annelid class in which organisms lack obvious cephalization, but possess a clitellum closest to the anterior end, as well as lacking parapodia but possessing few, short chaetae attached to each metamere

Cephalization, parapodia

Oligochaeta lack both ____ and _____.

Anterior end

Where is Oligochaeta’s clitellum?

Terrestrial earthworms

Class Oligochaeta contains...

Hirudinae

Annelid class that contains ectoparasites which lack chaetae/setae but possess two suckers

Chaetae

Hirudinae do not have ____.

Parasitic leeches

Class Hirudinae contains...

Hirudin

Parasitic leeches secrete an anesthetic and an anticoagulant called _________ which prevents blood clotting