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Invertebrates quiz

An animal is... Multicellular Eukaryotic Heterotrophic
Sponges No tissues or organs; no symmetry; hollow bag
larva an immature form of an animal that looks very different from the adult
Cnidarians have stinging cells and take food into a central body cavity; hollow, radial symmetry; 2 stage life cycle larvae and medusa or polyp
polyp vase-shaped body plan for a cnidarian fe- jellyfish
medusa bowl-shaped body plan; designed for swimming
colony a group of many individual animals
coral reef built by cnidarians
worms bilateral symmetry, no legs, flatworms, round worms, segmented worms
parasite an organism that lives inside or on another organism
host the organism in or on which it lives
free-living organism an organism that doesn't live in or on other organisms
scavengers animals that feed on dead or decaying material
anus where wastes exists; at the far end of the tube
closed circulatory system what segmented worms have; blood moves only within a connected network of tubes called blood vessels
mollusks soft, unsegmented bodies that are often protected by a hard outer shell; gills, mantle, foot, often radula, bilateral. symmetry, gastropods, bivalves, cephalopods
open circulatory system the blood is not always inside blood vessels
gills organs that remove oxygen from the water.
gastropods largest group of mollusks. They include snails and slugs. have a single external shell or no shell at all
herbivores animals that eat only plants
carnivores animals that eat only other animals
radula flexible ribbon of tiny teeth, to obtain food; organ
bivalves mollusks that have two shells held together by hinges ang strong muscles. Includes oysters, clams, scallops and mussels
omnivores animals that eat plants and animals
cephalopods an ocean dwelling mollusk whose foot is adapted to form tentacles around its mouth. Only mollusks with a closed circulatory system fe octopus, squid
arthropods divided into 4 major groups; crustaceans, arachnids, centipedes and millipedes, and insects. Invertebrates that have an external skeleton, a segmented body, and jointed attachments called appendages
exoskeleton a waxy water-proof covering. Protects the animal and helps prevent evaporation of water
molting shedding an outgrown exoskeleton
antenna an appendage attached to the head that contains sense organs
crustaceans an arthropod that has 2-3 body sections, 5 or more pairs of legs, and 2 pairs of antennae like shrimp lobster or crabs
metamorphosis a process in which an animal's body undergoes dramatic changes in form during its life cycle
arachnids arthropods with 2 body sections- cephalothorax and abdomen, four pairs of legs, and no antennae fe spiders-predators, ticks-parasites, mites-parasites, scorpions-predators
abdomen the hind section. Contains the reproductive organs and part of the digestive system.
insects arthropods with 3 body sections, 6 legs, 1 pair antennae, and usually 1-2 pairs wings like beesflies and moths. head: senses, compound eyes, antennae, many mouth part adaptations thorax: legs and wings attached, 3 pair legs abdomen:many internal organs
thorax midsection, the section to which wings and legs are attached
complete metamorphosis 4 diff. stages; egg, larva, pupa, and adult
pupa stage after larvae when insect is enclosed in a protective covering
gradual metamorphosis an egg hatches into a nymph that resembles an adult and which has no distinct larval stage stages are less distinct
bilateral symmetry one line fe fish
radial symmetry many lines fe seastar
centipedes 1 pair of legs for each bodysegment carnivorous
millipedes 2 pairs of legs for each body segment herbivores
echinoderms endoskeleton, radial symmetry, bumpy or spiky surface, water vascular system that helps with transport of materials and with movement, tube feet. live in saltwater
nymph a stage of gradual metamorphosis that usually resembles the adult insect
endoskeleton an internal skeleton
water vascular system the internal system of fluid filled tubes in echinoderms
tube feet extensions of an echinoderms water vascular system that stick out from the body and function in movement and obtaining food
Created by: sophiehudin