3. Annelida and Echinodermata Flashcards
(20 cards)
Which two Phyla are covered in today’s lab?
Annelida
Echinodermata
What are metameres?
A repeated homologous body segments.
What type of skeleton do annelids posses?
hydrostatic skeleton
Which class of annelids is only found in marine environments?
polychaeta
What is the name of the segment of the clamworm that contains the mouth?
peristomium
Name two functions of an annelid’s cuticle:
Structural support
Protection from environment
Which organism(s) from today’s lab have/has parapodia?
Clamworm
What is the basic mechanism for respiration in annelids?
Gas exchange through diffusion
Which two organisms that we’ll examine today have a clitellum?
Earthworm
Leech
Which phylum and class do sea cucumbers belong to?
Echinodermata, Holothuroidea
What is a nephridium?
An organ that is involved in waste excretion
Do annelids have a closed or an open circulatory system?
Closed(?)
Which phylum and class do leeches belong to?
Annelida, Hirudinida
What type of symmetry is displayed by echinoderms?
Pentaradial symmetry
Name three structures associated with the water vascular system
Three of;
- Ampullae
- Ambulacral Ridge
- Tube feet
- Radial Canal
- Madreporite
What are the two sections of a starfish’s stomach?
Pyloric Stomach
Cardiac Stomach
Describe one way that you can differentiate between the dorsal and ventral side of an earthworm.
Flat side is ventral
Small bristle-like setae at ventral surface
What is the function of the gizzard in the earthworm?
Physical digestion
What is the function of the seminal receptacles?
Stores sperm after copulation
Which phylum and class does sea urchin belong to?
Echinodermata, Echinoidea
