Invertebrate Animals Flashcards
(23 cards)
Embryo
A plant or animal at an early stage of development.
Consumer
An organism that eats other organisms or organic matter.
Innate Behavior
An inherited behavior that does not depend on the environment or experience.
Learned Behavior
A behavior that has been learned from experience.
Territory
An area that is occupied by one animal or a group of animals that do not allow other members of the species to enter.
Hibernation
A period of inactivity and lowered body temperature that some animals undergo in winter as a protection against cold weather and lack of food.
Estivation
A period of inactivity and lowered body temperature that some animals undergo in summer as a protection against hot weather and lack of food.
Circadain Rhythm
A biological daily cycle.
Social Behavior
The interaction between two animals of the same species.
Communication
A transfer of a signal or message from one animal to another that results in some type of response.
Pheromone
A substance that is released by the body and that causes another individual of the same species to react in a predictable way.
Invertebrate
An animal that does not have a backbone.
Ganglion
A mass of nerve cells .
Gut
The digestive tract.
Coelom
A body cavity that contains the internal organs.
Open Circulatory System
A circulatory system in which the circulatory fluid is not contained entirely within vessels.
Closed Circulatory System
A circulatory system in which the heart circulates blood through a network of blood vessels that form a closed loop.
Exoskeleton
A hard, external, supporting structure.
Compound Eye
An eye composed of many light detectors.
Antenna
A feeler that is on the head of an invertebrate, such as a crustacean or an insect, the senses touch, taste or smell.
Metamorphosis
A phase in the life cycle of many animals during which a rapid change from the immature form of an organism to the adult form takes place.
Endoskeleton
An internal skeleton made of bones and cartilage.
Water Vascular System
A system of canals filled with a watery fluid that circulates throughout the body of an echinoderm.
