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Science
Chapter 1
Term | Definition |
---|---|
invertebrate | an animal without a backbone |
sponge | a simple invertebrate that has a hollow |
cnidarian | an invertebrate with stinging cells on the ends of tentacles |
mollusk | an invertebrate that has a soft body and a shell |
echinoderm | a spiny skinned invertebrate |
endoskeleton | an internal supporting structure |
arthropod | an invertebrate with jointed legs, a body that is divided into sections, and an exoskeleton |
exoskeleton | a hard covering that protects the bodies of some invertebrates |
amphibian | a cold blooded vertebrate that spends part of its life in water and a part of its life on land |
bird | a vertebrate that has a beak, feathers, two wings and two legs |
mammal | a warm blooded vertebrate with hair or fur; female mammals produce milk to feed their young |
cold blooded | a type of animal that gets its heat from outside its body |
reptile | a cold blooded vertebrate that has scaly waterproof skin breathes air with lungs and lays eggs |
vertebrate | an animal with a backbone |
warm blooded | a kind of animal whose body temperature does not change much |
nervous system | the set of organs that use information from the senses to control all body systems |
muscular system | the organ system made up of muscles that help the body move |
excretory system | the organ system that removes wastes from the body |
skeletal system | the organ system made up of bones that support the body |
digestive system | the organ system that breaks down food for fuel |
circulatory system | the organ system that moves blood throughout the body |
respiratory system | the organ system that brings oxygen to body cells and removes waste gas |