Set: Bio. 1 26-1 Introduction to the Animal Kingdom

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All 29 Terms

Term Definition
invertebrates animals that have no backbone
vertebrates animals that have a backbone
parasite organism that lives within or on another organism and harms that organism by feeding on it
host organism that provides a source of nutritional needs for a parasite
blastula hollow ball of cells formed when a zygote undergoes a series of divisions
protostome animal whose mouth is formed from its blastopore
deuterostome animal whose anus is formed from the blastopore of a blastula
anus opening through which wastes leave the digestive tract
endoderm innermost germ layer of most animals; develops into the linings of the digestive tract and much of the respiratory system
mesoderm middle germ layer of most animals; gives rise to muscles and much of the circulatory, reproductive, and excretory systems
ectoderm outermost germ layer of most animals; gives rise to outer layer of skin, sense organs, and nerves
radial symmetry body plan in which body parts repeat around the center of the body; characteristic of sea anemones and sea stars
bilateral symmetry body plan in which only a single, imaginary line can divide the body into two equal halves; characteristic of worms, arthropods, and chordates
cephalization concentration of sense organs and nerve cells at the front of an animal's body
anterior the front end
posterior the back end
dorsal the upper side
ventral the lower side
herbivore an animal that eats plants
carnivore an animal that feeds on other animals
filter feeder an aquatic animal that strains tiny floating plants and animals from the water around them
detritvore an animal that feeds on pieces of decaying plants and animal matter
respire to take in oxygen and give off carbon dioxide
diffusion process by which molecules tend to move from an area where they are more concentrated to an area where they are less concentrated; used by many small aquatic animals because they are only a few cell layers thick
sexual reproduction helps a species maintain genetic diversity
asexual reproduction allows animals to increase their numbers rapidly
receptors cells that respond to sound, light, and other stimuli
body cavity fluid filled space that lies between the digestive tract and body wall; it provides a space for internal organs so they can be suspended and aren't pressed by muscles or twisted out of shape
animals members of the kingdom Animalia, are multicellular, eukaryotic heterotrops who cells lack cell walls

Set Information

Terms 29
Creator davi_baby
Created May 1, 2008
Groups None
Tag biology
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davi_baby : Changed mesoderm → middle germ layer of mose animals; gives rise to muscles and much of the circulatory, reproductive, and excretory systems to mesoderm → middle germ layer of most animals; gives rise to muscles and much of the circulatory, reproductive, and excretory systems
Last Message: 5 months ago

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Most Missed Words

  1. deuterostome → animal whose anus is formed from the blastopore of a blastula - 4 misses
  2. protostome → animal whose mouth is formed from its blastopore - 3 misses
  3. endoderm → innermost germ layer of most animals; develops into the linings of the digestive tract and much of the respiratory system - 3 misses
  4. cephalization → concentration of sense organs and nerve cells at the front of an animal's body - 3 misses
  5. ventral → the lower side - 3 misses
  6. blastula → hollow ball of cells formed when a zygote undergoes a series of divisions - 2 misses
  7. detritvore → an animal that feeds on pieces of decaying plants and animal matter - 2 misses