Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
7th Grade Chapter 9
Introduction to Animals
| Term | Definition |
|---|---|
| vertebrates | animals with a backbone |
| invertebrates | animals without a backbone |
| survive | mangage to stay alive, especially in difficult situations |
| organism | a living thing |
| environment | all the surrounding factors that affect the organism's live |
| homeostasis | keeping internal body conditions stable |
| adaptations | structures and behaviors that allow animals to perform their functions |
| tissue | a group of similar cells that performs a specific function |
| organ | made up of different type of tissues |
| radial symmetry | a body plan in which any number of imaginary lines that all pass 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 |
| dnidarians | invertebrates that have stinging cells and take food into a central body cavity |
| mollusks | invertebrates with soft, unsegmented bodies that are often protected by a hard shell |
| anthropods | invertebrates that have hard outer coverings, segmented bodies and pairs of jointed appendages |
| exoskeleton | outer skeleton |
| echinoderm | invertebrate that has an internal skeleton and a system of fluid-filled tubes |
| endoskeleton | internal skeleton |
| chordates | an animal that has a notochord, a nerve cord, and throat pouches at some point in its life |
| notochord | a flexible rod that supports a chordate's back |
| vertebrae | the bones that make up the backbone of an organism |
| ectotherm | an animal that produces little internal body heat, its body temperature changes with temperature changes in its environment |
| endotherm | an animal that controls the internal heat it produces and regulates its own temperature |
| fish | vertebrate that lives in water and uses fins to move |
| cartilage | a tissue more flexible than bone |
| amphibian | vertebrate hat is ectothermic and spends its early life in water and its adult life on land |
| reptile | vertebrate that is ectothermic and has scaly skin and lungs and lays eggs on land |
| bird | endothermic vertebrate that lays eggs and has feathers and a four-chambered heart |
| mammals | endothermic vertebrates that have skin covered with fur or hair, a four-chambered heart and the young are fed with milk produced by mammary glands |
| mammary gland | an organ in female mammals that produces milk for the mammal's young |
| monotremes | mammals that lay eggs |
| marsupials | mammals that are born at an early stage of development and usually continue to develop in a pouch on the mother's body |
| placental mammal | mammal that develops inside its mother's body until its body systems can function independently |
| placenta | an organ in most pregnant mammals including humans, that links the mother and the developing embryo and allows for the passage of materials between them |
Created by:
dselling
Popular Biology sets