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30 Cards in this Set
- Front
- Back
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Sessile
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no movement
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Hydrostatic Skeleton
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consists of a layer of circular muscles and a layer of longitudinal muscles
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Choanocyte
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specialized cell in sponges that uses a flagellum to move a steady current of water through the sponge
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Closed Circulatory System
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where the blood never leaves the vessels
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Open Circulatory System
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where the blood circulates throughout the body and it pools over the organs
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Endoskeleton
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Skeleton inside the body
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Exoskeleton
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Skeleton on the outside of your body
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External reproduction
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Female lays the eggs outside the body and the male fertilizes them
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Extracellular Digestion
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process in which cood is broken down outside the cells in a digestive tract
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Eyespots
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a group of cells that can detect changes in the amount of light
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Filter feeder
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strains plant and animal particles from the water
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Hermaphrodite
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Both male and female parts
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Internal Reproduction
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The male fertilizes the egg inside the females body
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Intracellular
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Digestion occurs inside the cell
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Meiosis vs. Mitosis
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Mitosis is cell division and Meiosis is making gametes
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Nephridia
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tube-shaped nephridia remove ammonia from the blood and releases it outside the body
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Nerve Net
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a loosley organized network of nerve cells that together allow them to detect stimuli
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Parasite vs External Parasite
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Parasite ruins the inside of your body ie. tape worm
External Parasite is on the outside that attaches to you ie leeches and fleas |
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physical changes that occured during the precambrian explosion
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animals evolved shells, skeletons, and other hard body parts that preserved better.
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setae
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Bristle attached to the segments of many annelids
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spicule
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spike-shaped structure that makes up the skeletons of harder sponges
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Trochophore larva
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free swimming larval stage of an aquatic mollusk
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tube feet
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suction cup-like structure attatched to radial canals of echnioderms used to walk and to open shells
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water vascular functions
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In echinoderms it includes feeding respiration circulation excretion and movement
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Characteristics of Sponges
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filter feeders
intracellular digestion diffusion for respiration circulation and excretion DOESN'T have a nervous system |
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characteristics of cnidarians
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have a gastrovascular cavity
have nematocyst use diffusion for respiration, circulation, and excretion have nerve net use jet propulsion |
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characteristics of worms
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types are: flat, round, and segmented
use diffusion for respiration have eyespots segmented have aortic arches |
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characteristics of mollusks
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have radula
use gills or mantle cavity have nephridia have muscles have trochophore larvae |
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characteristics of echnoderms
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use watervascular system for feeding, respiration, circulation, excretion and movement
have eyespots use external fertilization |
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characteristics of arthropods
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respire through gills for water or spiracle holes or book lungs for land
have an open circulatory system use malpighian tubes for terrestrial excretion molt their exoskeleton |
