Sponges/Cnidaria
Sponges are invertebrates that usually have no body symmetry and never have tissues or _______.
The 3 categories of species within the mollusks include
gastropods, cephalopods, and bivalves
An earthworm's body is made up of many tiny linked sections called _________.
segments
What is an invertebrate that has an external skeleton, a segmented body, and jointed attatchements called appendages?
An Arthropod
Echinoderms have a ________ _________ system which is an internal organ system with fluid-filled tubes.
Water Vascular
Immature form of an animal that looks different that the adult
larva
Gastropods have what type of circulatory system
open
Do segmented worms have an open or closed circulatory system?
Closed
Arthropods shed their exoskeleton through a process called _______.
Molting
Does an echinoderm have an endoskeleton or an internal skeleton?
What are the simplest animals?
sponges
Give an example of a crustacean.
Crab, lobster, crayfish
What organ was the first to be discovered in a worm?
The Brain
What type of arthropod would crayfish, lobsters, or shrimp be considered?
Name one example of an echinoderm:
Sea stars (NOT STARFISH!!), sea urchins, or sea cucumber
What are the two body plans for a jelly fish?
Polyp & medusa
What is the purpose of the redula?
to obtain food
What worm is free-living?
Planarian
An insects midsection is called the _________.
Thorax
________ _______ line the underside of a sea star's arms and act like tiny suction cups.
Tube feet
Whiplike structure on sponges used to move water and trap food.
collar cells
What type of mollusk is an octopus or squid?
Cephalopod
What is an organism that lives inside or on another organism?
A parasite
True/False: A scorpion is considered an arachnid since it has 8 legs and no antennae.
True
What type of symmetry do echinoderms have?
Radial Symmetry