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B-3 Ch-4
Lesson 1-5
| Term | Definition |
|---|---|
| homeatosis | the condition in which an organism internal environment is kept stable spite of changes of external enviorment |
| adaptation | an enarited behavior or physical characteristic that helps survive that helps an organism survive and reproduce inits enviorment |
| vertibrate | an animal with a backbone |
| invertibrate | 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 tissues that work together |
| radial symetry | a body plan inn which any number of imaginary lines that all pass through a central point devide the animal into two mirror images |
| bilateral symetry | a body plan in which a single imaginary line decides the body into left, and right sides that are mirror images of eachother |
| cinidran | a radially symmetrical invertibrate that uses stinging cells to capture food and defend itself |
| mollusk | an invertibrate with a soft unsegmented body most are protected by a hard outer shell |
| arthropod | an invertebrate that has an external exoskeleton a segmented body and jointed ependages |
| exoskeliton | external skeleton a though water proof outer covering that protects supports and helps prevent evaporation of water from the body |
| echinondrem | an animal whose body temperature is determened by the temperature outside |
| Endoskeleton | an internal skeleton structual support system within the body of an animal |
| chordate | an animal that has a notochord a nerve cord and and throat pouches in some point in his life |
| notochord | a flexible rod that supports a chordates back just below the nerve cord |
| vertebrae | the bone that make up the backbone of an organism in humans=s one of the 26 bones that make up the backbone |
| ectotrem | an animal who body tmep is dertermened by the temp of its enviorment |
| endothrem | an animal whose body temperature is regulated by the internal heat the animal produces |
| fish | a vertibrate whose body temp is determined by the temp of its enviorment and lives in the water and has fins |
| cartlage | a connective tissue that is more flexible than bone and that products the ends of bones and keeps them from rubbing together |
| anphibian | a vertibrate whose body temp is determined by the temp of the enviorment and that lives its early life on water and its adult life on land |
| reptile | a vertibrate whose temperature is determined by the temp of its enviorment |
| bird | a vertebrate whose body temp is regulated by its internal heat lays eggs and has feathers and a four chambered heart |
| mammal | a vertebrate whose body temp is regulated by its internal heat and that has skin covered with fur and glands that produce milk to feed its young |
| mammary gland | an organ in female mammals that produces milk for its young |
| monotreme | a mammal that lays eggs |
| marsupial | a mammal whose young are born at a early stage of development and which usually continue to develop in a pouch on their mothers body |
| placental mammal | a mammal that develops inside its mothers body until its body system can function independantly |
| placenta | an organism most pregnant mammals including humans that links the mother and the developing embryo and follows and allows for the passage of materials |
Created by:
avitale036
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