Shared Flashcard Set

Details

Chapter 25 Vocab
Biology 102
39
Biology
Undergraduate 1
01/20/2012

Additional Biology Flashcards

 


 

Cards

Term
Animals
Definition
multicelled heterotrophs that move about during part or all of the life cycle
Term
radial symmetry
Definition
body parts are repeated around a central axis
Term
bilateral symmetry
Definition
many parts are paired
Term
cephalization
Definition
nerve cells have become concentrated at the head end
Term
gut
Definition
digestive sac or tube that opens at the body surface
Term
coelom
Definition
cavity lining of tissue derived from mesoderm
Term
pseudocoel
Definition
cavity incompletely lined by mesodermal tissue
Term
protstomes
Definition
first opening that appears on the embryo becomes the mouth and the second becomes the anus
Term
deuterosomes
Definition
first opening develops into the anus and the second becomes the mouth
Term
choanoflagellates
Definition
the modern protest most closely related to animals
Term
molt
Definition
periodically shed
Term
sponges
Definition
aquatic animals with no symmetry, tissues, or organs
Term
hermaphrodite
Definition
individual that produces both eggs and sperm
Term
larva
Definition
free-living, sexually immature stage in an animal life cycle
Term
cnidarians
Definition
include 10,000 species of radially symmetrical animals such as corals, sea anemones, and jellyfishes
Term
nematocysts
Definition
help capture prey and also function as a defense
Term
nerve net
Definition
simple nervous system
Term
hydrostatic skeleton
Definition
fluid-filled cavity or cellular mass that contractile cells exert force on
Term
flatworms
Definition
form a three-layered embryo and have organ systems
Term
pharynx
Definition
connects the mouth with the gut
Term
nerve cords
Definition
communication line
Term
ganglia
Definition
cluster of nerve cells
Term
annelids
Definition
bilateral worms with a coelon and a body that is segmented, inside and out
Term
nephridia
Definition
collects coelomic fluid, adjusts its composition, then expels waste through a pore in the next segment
Term
mollusk
Definition
bilaterally symmetrical invertebrates with a reduced coelom
Term
mantle
Definition
skirtlike extension of the upper body wall that covers a mantle cavity
Term
gills
Definition
aquatic mollusks typically have one or more respiratory organs
Term
radula
Definition
tonguelike organ hardened with chitin
Term
chitons
Definition
cling to rocks and scrape up algae
Term
bivalves
Definition
include many of the mollusks that end up on our dinner plates, including mussels, oysters, clams, and scallops
Term
cephalopods
Definition
aquatic and include the squids, octopuses, and relatives
Term
rotifers
Definition
live in freshwater and in damp land habitats.
Term
tardigrades
Definition
similarly tiny animals that often live beside rotifers in damp moss and temporary ponds
Term
roundworms
Definition
bilateral, unsegmented worms with a cuticle-covered cylindrical body
Term
exoskeleton
Definition
hard, external skeleton
Term
metamorphosis
Definition
tissues get remodeled as juveniles become adults
Term
crustaceans
Definition
mostly marine arthropods that have two pairs of antennae
Term
myriapod
Definition
land-dwelling arthropods with two antennae and an abundance of body segments
Term
echinoderms
Definition
interlocking spines and plates of calcium carbonate embedded in their skin
Supporting users have an ad free experience!