Life Science - Chapter 15

32 terms by cjones7787 

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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

plathelminthes

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

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