Show:
Phylum Porifera
Phylum Cnidaria
Phylum Annelida
Phylum Platyhelminthes
Phyla Nematoda & Mollusca
100
an organism that can be cut into two identical halves by any longitudinal cut through its center
What is radial symmetry?
100
animals that lack a backbone
What are invertebrates?
100
the end of an animal that contains it's head
What is anterior?
100
common name for members of the Platyhelminthes Phylum
What is flat worm?
100
Phylum Nematoda are often called
What are roundworms?
200
flagellated cells that push water through a sponge
What are collar cells?
200
the sessile, tubular form of a cnidarian with a mouth and tentacles at one end and a basal disk at the other
What is a polyp?
200
the earthworm ingests soil into it's mouth by using it's powerful ______ to create sucking action
What is pharnyx?
200
the ability to regrow a missing part of the body
What is regeneration?
200
when a person eats poorly cooked pork, there is a risk of developing this
What is trichinosis?
300
the jellylike substance that separates the epidermis from the inner cells of the sponge
What is mesenchyme?
300
a free-swimming cnidarian with a bell-shaped body and tentacles
What is a medusa?
300

possessing both the make and female reproductive organs

What is hermaphroditic?

300
flat worms do not need a __________ ______ due to the advanced nature of another biological system
What is circulatory system?
300
an organ covered with teeth that mollusks use to scrape food into their mouths
What is a radula?
400
cells that move using pseudopods and perform different functions in different animals
What are amoebacytes?
400
small capsules that contain a toxin which is injected into prey or predators
What are nematocysts?
400
masses of nerve cell bodies, may be called a "brain"
What are ganglia?
400

flat worm with complex digestive and nervous systems is a ____________

What is a planarian

400

sometimes called pelecypods

What are bivalves?

500
a cluster of cells encased in a hard, spicule-reinforced shell
What is gemmule?
500
animal tissue consisting of one or more layers of cells that have only one free surface, because the other surface adheres to a membrane or other substance
What is epithelium?
500
this stops when an earthworm's cuticle dries up
What is respiration?
500

characteristics include primitive digestive and nervous systems, suckers, hooks, and mechanisms to protect themselves from digestive juices and infection-fighters

What is a parasitic flatworm? (tapeworms, flukes)

500
The part of a mollusk that contains the organism's heart, digestive, and excretory organs
What is a visceral hump?