animals and behavior Flashcards
an animal of a large group distinguished by the possession of a backbone or spinal column, including mammals, birds, reptiles, amphibians, and fishes.
Vertebrates
an animal lacking a backbone, such as an arthropod, mollusk, annelid, coelenterate, etc
Invertebrates
a person or thing that eats or uses something.
Consumer
a structure containing a number of nerve cell bodies
Ganglion
the digestive tract
Gut
a body cavity that contains the internal organs
Coelom
the property of being divisible into symmetrical halves on either side of a unique plane.
Bilateral Symmetry
symmetry around a central axis, as in a starfish or a tulip flower.
Radial Symmetry
symmetry around a central axis, as in a starfish or a tulip flower.
Asymmetry
a primitive sedentary aquatic invertebrate with a soft porous body that is typically supported by a framework of fibers or calcareous or glassy spicules
Sponges
an aquatic invertebrate animal of the phylum Cnidaria
Cnidarians
Platyhelminthes, or platyhelminths are a phylum of relatively simple bilaterian, unsegmented, soft-bodied invertebrates.
Flatworms
constitute the phylum Nematoda, with plant-parasitic nematodes being known as eelworms. They are a diverse animal phylum inhabiting a broad range of environments.
Roundworms
an invertebrate of a large phylum which includes snails, slugs, mussels, and octopuses.
Mollusks
also known as the ringed worms or segmented worms, are a large phylum, with over 22,000 extant species including ragworms, earthworms, and leeches
Annelid worms
a rigid external covering for the body in some invertebrate animals, especially arthropods, providing both support and protection.
Exoskeleton
visual organ found in arthropods such as insects and crustaceans. It may consist of thousands of ommatidia,
Compound eye
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Antenna
the process of transformation from an immature form to an adult form in two or more distinct stages.
Metamorphosis
an internal skeleton, such as the bony or cartilaginous skeleton of vertebrates.
Endoskeleton
a network of water vessels in the body, the tube feet being operated by hydraulic pressure within the vessels.
Water vascular system