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CHapter 4
| Question | Answer |
|---|---|
| homeostasis | the condition in which an organisms internal environment is kept stable in spite of changes in external environment |
| adaption | an inherited behavior or physical characterristic that helps an organism survive and reproduce in its environment |
| vertebrate | an animal with a backbone |
| invertebrate | an animal without a backbone |
| tissue | a group of similar cells that preform a specific function |
| organ | a body structure that is composed of different kinds of tissue |
| radial symmetry | a body plan in which any number of imaginary lines that all pass through a central point |
| bilateral symmetry | a body plan in which a imaginary line separates the body into left and right sides |
| cnidarian | a radially symmerrical inveretabrate that users single cells |
| mollusk | a inveretabrate with a soft body |
| arthropod | a invertebrate that has an external skeleton |
| exoskeleton | external skeleton a tough waterproof outer covering that protects supports and helps prvent evaporation |
| echinoderm | a radially summertical marine invertrnrate that has an internal skeleton |
| endoskeleton | an internal skeleton structural support system within the body of an animal |
| chordate | an animal that has a nerve cord an throat pouches at some point in its life |
| notochord | a flexible rod that supports a chordates back just below the nerve cord |
| vertebra | the bones that make up the backbone of an organism |
| ecrotherm | an animal whose body temputre is regulated |
| fish | a vertebrate whose body temperature is detimerened on its envioprment |
| cartolige | a connective tissue that is more flexible than a bone and protects the ends of bones |
| amphilbian | a vertebrate whose body temperature is detimerened on its envioprment, breath under water |
| reptile | a vertebrate whose body temperature is detimerened on its envioprment, has scaly skin and lungs |
| bird | a vertebrate whose body temperature is regulated by is internal heat, has fethares and lays eggs |
| mammal | a vertebrate whose body temperature is regulated by is internal heat, has skin covered with fur and glands that produce milk |
| mammary gland | an organ in female mammals that produce milk for the mammals young |
| monotreme | a mammal that lays eggs |
| marsupial | a mammal whose young is born at an early stage of development |
| placental mammal | a mammal that develops inside is morhers body until its body system can function on its own |
| placenta | an organ in most pregnant mammals including humans that kinks the mother and the develping emvryo |
Created by:
mgadwood002