How can we help?

You can also find more resources in our Help Center.

32 terms

Life Science - Chapter 15

STUDY
PLAY
aortic arches
organs that help to control blood pressure in earthworms
bilateral symmetry
a type of symmetry in which there are two equal sides to an animal; only one possible plane will divide it into equal halves
capillary
one of many small blood vessels that have walls that are one cell thick; materials are exchanged between the blood and other body tissues in the capillaries
closed circulatory system
a type of circulation in which the blood remains in vessels
filter feeder
an organism that obtains food from water circulating through its body
ganglion
a mass of nerve tissue; sometimes called a simple brain in many invertebrates
nematocyst
a type of stinging cell possessed by cnidarians; used for defense or for capturing food
nephridia
tubelike structures that filter wastes from the blood in some organisms
nerve
a number of neurons arranged side by side and wrapped in a protective covering
neuron
a long, thin nerve cell that carries impluses between various parts of the body
radial symmetry
a type of symmetry in which several different planes could divide an animal into equal halves
sensory receptor
a structure capable of receiving a stimulus from the environment and sending an impluse along a neuron
skeleton
a structure in animals and humans which provides mechanical support for muscle attachment and maintaining body shape
stimulus
anything that causes a response in an organism
vein
in animals a blood vessel that carries blood toward the heart; in plants, the vascular tissues in leaf blades
invertebrate
an animal without a backbone
porifera
phylum that the animals must have pores; example - sponges
cnidarians
phylum that have stinging cells; example - jellyfish
platyhelminthes
phylum that are flat worms; example - planarian
nematoda
phylum that are roundworms; examples - roundworm (ascaris), hookworms, pinworms, trichina worms
annelida
phylum that are segmented worms; examples - earthworm, leeches, tubeworms, scale worms, clam worms, and lugworms
animals
are living arganisms, eukarotic, multicellular, have organized tissues, and can move
gastrovascular cavity
digestive chamber of a jellyfish
hard corals
type of corals that help build coral reefs
bilateral
type of symmetry of flatworms
flame cells and pores
structures that the planarian uses to romove wastes from its body
nephridia
structures in the earthworm responsible for collecting wastes
ectoderm
the outer tissue layer in a jellyfish
spongin
protein component of some sponge skeletons
hydrostatic
a type of skeleton similar to a water balloon
coral
an animal in the same phylum as the jellyfish
two
number of layers of tissue found in a jellyfish