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Chapter 4 vocab
| Question | Answer |
|---|---|
| Homeostasis | The condition in which organisms internal environment is kept stable in spite of changes in the external environment. |
| adaptation | An inherited behavior or physical characteristic, that helps an organism survive and reproduce in its environment. |
| Vertebrate | The bones that make up the backbone of an organism. In humans, one of the 26 bones that make up the back bone. |
| Invertebrate | An animal without a backbone. |
| Tissue | A group of similar cells that perform a specific function. |
| Organ | A body structure that is composed of a different kind of tissue that work together. |
| Radial symmetry | A body plan in which any number of imaginary lines that all passed through a central point divide the animal into two mirror images. |
| Bilateral symmetry | A body plan in which a single imaginary line divides the body into left and right sides that are mirror images of each other. |
| Arthropod | An vertebrae that has an external skeleton, a segmental body, and jointed appendages. |
| Mollusk | An vertebrae with a soft, unsegmented body, most are protected by a hard outer shell |
| Cnidarian | A radially Mical vertebrae that uses stinging cells to capture food and defend itself |
| Exoskeleton | External skeleton, a tough, waterproof outer, covering that protects, supports, and help helps prevent evaporation of water from the body of many vertebrae. |
| Echinoderm | Erratically symmetrical marine vertebrae that has an internal skeleton and a system of fluid filled tubes. |
| Endoskeleton | An inter, internal skeleton, structural support system within the body of an animal. |
| Chordate | An animal that has a notch cord, a nerve cord, and throat pouches at some point in its life. |
| Notochord | A flexible rod that supports a Chordettes back just below the nerve cord |
| vertebra | The bones that make up the backbone of an organism. In humans, one of the 26 bones that make up the back bone. |
| Endotherm | An animal whose body temperature is regulated by the internal heat, the animal produces. |
| Ectotherm | An animal whose body temperature is determined by the temperature of its environment. |
| Fish | a vertebrae whose body temperature is determined by the temperature of its environment, and the lives in the water and has fins. |
| Cartilage | A connective tissue that is more flexible than bones and has protected the ends of the bones and keeps them from rubbing together |
| Amphibian | A vertebrae whose body temperature is determined by the temperature of its environment, and lives in its early life in water and it’s adult life on land |
| Reptile | A vertebrae whose temperature is determined by the temperature of its environment, that has lungs and scaly skin, and lays eggs on the land |
| Bird | A vertebrae whose body temperature is regulated by its internal heat. Lays eggs, and has feathers and four chambered heart. |
| Mammal | A vertebrae whose body temperature is regulated by its internal heat, and has skin covered with hair or fur and glands that produce milk to feed its young. |
| Mammary Gland | In Oregon in female mammals that produce milk for the mammals young |
| Monotreme | A mammal that lays eggs. |
| Marsupial | A mammal who’s young are born at an early stage of development and usually continue to develop in a pouch on their mothers body. |
| Placental mammal | A mammal that develops inside the mothers body until the body systems can function independently |
| Placenta | An Oregon in most pregnant mammals, including humans, that links the mother and The developing embryo and allows for the passage of material between them. |
Created by:
rgrabetz00