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filter feeders

multicelluar, eukaryotic, heterotrophs, lack cell walls

animalia characteristics?

bilateral symmetry

arrangement of an organism's body parts so that if a line was drawn down the middle, the body's parts would repeat on either side


lack mouth, anus and gut


concentration of sensory organs and nerve cells at the head of an animal's body


embryonic tissue for epidermis

amoebocyte cell

what are spongeons/spiracles made out of?


embryonic tissue for gastrodermis

pharnyx, brain, muscles

flatworm structures


muscular tube-like structure located at the back of the mouth that connects the mouth with the rest of the digestive tract

spongeon or spicules

porifera: what is the endoskeleton made of?


planaria(platyhelminthyes) have a(n) _________ digestive system

mouth, anus

characteristics of roundworms (nematoda)

tube within a tube

nematode body plan

body cavity

A fluid-containing space between the digestive tract and the body wall. (protects organs) (growth and expansion)

soft body, radula, muscular foot

mollusk characteristics


mollusks use the ________ to scrape and grind their food

filter feeders

aquatic animal that feeds by straining tiny floating plants and animals from the water around it


what is the function of the muscular foot?

visceral mass

structure in mollusks that contain internal organs


thin, delicate area of tissue that covers most of a mollusk's body and secretes the shell when one is present


arthropods have a(n) ___________ circulatory system

open circulatory

a circulatory system in which the circulitory fluid is not contained entirely in blood vessels

closed circulatory

blood circulates entirely within blood vessels that extend throughout the body


complex carbohydrate found in arthropod exoskeleton's and fungal cell walls


insects breathe through ________


arthropods have a(n) __________ digestive system

uric acid crystals

undigested waste and ________ _________ _______ is eliminated

complete metamorphosis

egg, larva, pupa, adult

incomplete metamorphosis

egg, nymph, adult

size, reproductive organs, wings

differences between immature and adult in incomplete metamorphosis


have true tissues, tentacles and gastrovascular cavity


cnidarians have a(n) _________ digestive system


what do cnidarians catch their pray with?


cnidarians: food is broken down ________


process in which food is broken down outside the cells


process in which food is broken down inside the cells


platyheldminthes have a ________ body plan

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