Invertabrates Flashcards
(23 cards)
vertebrate
an animal that has a backbone
invertebrate
an animal that doesn’t have a backbone
consumer
an organism that eats another organism or organic matter
ganglion
a mass of nerve cells
Gut
the digestive tract
Coelom
a body cavity that contains the internal organs
Bilateral Symmetry
the two sides of the body mirror on each side
Radial Symmetry
the body is organized around the center
Asymmetry
the body is divided into two or more parts
Sponges
an animal of the phylum
Cnidarians
the group that contains jellyfish
Flatworms
an animal of the phylum
Roundworms
an animal of the phylum
Mollusks
the second-largest animal of the phylum
Open circulatory system
where blood suffuses the body and may be directly open to the environment
Closed circulatory system
where blood is closed at all times within vessels of different size and wall thickness
Annelid worms
their body is divided into two parts both internally and externally
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 that senses touch, taste, or smell
Metamorphosis
a phase in the life cycle of msny animals during which a rapid change from the immunature form an organism to the adu;t form takes place
Endoskeleton
an internal skeleton made of bone and cartilage
Water vascular system
a system of canals filled with a watery fluid that circulates throughout the body of an echinoderm
