Term
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Definition
| the basic unit of structure and function in living things |
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Term
| list the three levels of organization in animals in order from smallest to largest. |
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Definition
| cell --> tissue --> organ --> system |
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Term
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Definition
| A group of similar cells that perform a specific function |
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Term
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Definition
| a group of several different tissues |
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Term
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Definition
| groups of structures that perform the broadest functions of an animal |
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Term
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Definition
| Structures or behaviors that allow animals to perform these basic functions in their environments |
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Term
| list the four major functions of animals |
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Definition
1. move
2. obtain food and oxygen
3. reproduce
4. maintain homeostasis |
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Term
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Definition
| the 35 major groups that Biologists have classified animals into |
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Term
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Definition
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Term
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Definition
| animals without backbones |
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Term
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Definition
| animal with just one line that divides it into halves that are mirror images |
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Term
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Definition
| animal that has many lines of symmetry that all go through a central point. |
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Term
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Definition
| balanced arrangement of parts |
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Term
| list characteristics of animals with bilateral symmetry |
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Definition
1. larger and more complex
2. head part that moves first
3. swift movements
4. sense organs in the front end |
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Term
| List characteristics of animals with radial symmetry |
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Definition
1. live in water
2. do not move very fast
3. do not move much, many stay in one spot |
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Term
| List the three phyla of worms |
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Definition
1.Flatworms – phylum Platyhelminthes
2.Roundworms – phylum Nematoda
3.Segmented worms – phylum Annelida |
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Term
| list four characteristics of all worms |
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Definition
1.invertebrates
2.long narrow bodies without legs
3.bilateral symmetry
4.tissues, organs, and body systems |
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Term
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Definition
| an organism that lives inside or on another organism and cause harm |
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Term
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Definition
| an organism that does not live in or on other organisms. |
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Term
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Definition
| organisms that feed on dead or decaying material. |
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Term
| list the characteristics of planarians |
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Definition
free living flatworms
eyespots to detect light
find food by smelling
scavengers and predators |
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Term
| list the characteristics of tapeworms |
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Definition
parasitic flatworm
absorb food from digestive system of hosts |
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Term
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Definition
| worms that are flat and soft, examples: planarians, flukes and tapeworms |
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Term
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Definition
| worms with cylindrical bodies, live in moist environments |
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Term
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Definition
-like a tube - food goes in the mouth and is digested and then wastes exit through the anus.
-very efficient |
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Term
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Definition
| the opening at the end of an organism’s digestive system through which wastes exit. |
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Term
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Definition
| worms with bodies made up of many linked segments, examples: earthworms, leeches and sea-floor worms. |
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Term
| list characteristics of segmented worms |
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Definition
-one way digestion
-closed circulatory system
-have tissues, organs and systems
-some organs repeat in different segments
-some organs are only found in 1 segment
-have a nerve cord through whole body |
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Term
| closed circulatory system |
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Definition
| blood moves only within a connected network of tubes called blood vessels. |
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Term
| list three ways earthworms help the environment |
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Definition
-decompose leaves and decaying organisms
-help gardeners by breaking up soil to allow roots to grow easily
-fertilize soil with their waste |
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Term
| how do earthworms take in oxygen? |
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Definition
earthworms take in oxygen from the moisture(water)on their skin.
They must stay moist! |
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Term
| three characteristics of sponges |
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Definition
1. invertebrates
2. no symmetry
3. no tissues or organs |
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Term
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Definition
| an immature form of an animal that looks very different from the adult |
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Term
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Definition
| invertebrates that have stinging cells and take food into a central body cavity. |
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Term
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Definition
| a cnidarian with a vase-shaped body plan, example: anemone, coral |
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Term
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Definition
| a cnidarian with a bowl-shaped body plan, example: jellyfish |
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Term
| characteristics of polyps |
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Definition
1. mouth a top, surrounded by tentacles
2. adapted for life attached to a surface |
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Term
| characteristics of medusas |
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Definition
1. mouth on bottom, tentacles float down below
2. adapted for swimming |
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Term
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Definition
1. stinging cells attach to prey (some inject venom)
2. tentacles take food into mouth
3. food is digested in the hollow body cavity
4. any food that isn't digested is pushed out |
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Term
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Definition
| a group of many individual animals. example: coral reef, man-o-war |
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Term
| steps to build a coral reef |
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Definition
1. a coral polyp attaches to a solid surface.
2. The coral polyp produces a hard, stony skeleton around its soft body.
3. The coral polyp reproduces asexually – thousands and thousands of polyps are produced, all with a hard skeleton.
4. When the polyps die, their skeletons remain behind.
5. Live corals add their skeletons to those that have died and rocklike reefs grow up from the sea floor.
6. The top layer is all living corals |
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Term
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Definition
| A colony of polyps and medusas, as many as 1,000 individuals that function together as one unit. |
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