intvertebrate Flashcards
Animals with backbones
verbrates
an animal that does not have a backbone
invertabrate
an organism that eats other organisms or organic matter
consumer
a mass of nerve cells
ganglion
the digestive tract
gut
a body cavity that contains the internal organ
coelom
a circulatory system in which the circulartory fluid is not contained entirely within vessels
open circulatory system
a circulatory systen in which the haert circulates blood through a network of blood through a network of blood vessels that form a closed loop
closed circulatory system
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
ack of equality or equivalence between parts or aspects of something; lack of symmetry.
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 draw in a current of water to extract nutrients and oxygen.
Sponges
an aquatic invertebrate animal of the phylum Cnidaria, which comprises the coelenterates.
Cnidarians
a worm of a phylum which includes the planarians together with the parasitic flukes and tapeworms. They are distinguished by having a simple flattened body which lacks blood vessels, and a digestive tract which, if present, has a single opening.
Flatworms
a nematode, especially a parasitic one found in the intestines of mammals.
Roundworms
an invertebrate of a large phylum which includes snails, slugs, mussels, and octopuses. They have a soft unsegmented body and live in aquatic or damp habitats, and most kinds have an external calcareous shell.
Mollusks
a segmented worm of the phylum Annelida, such as an earthworm or leech
Annelid worms
a rigid external covering for the body in some invertebrate animals, especially arthropods, providing both support and protection.
Exoskeleton
an eye consisting of an array of numerous small visual units, as found in insects and crustaceans.
Compound eye
either of a pair of long, thin sensory appendages on the heads of insects, crustaceans, and some other arthropods.
Antenna
a change of the form or nature of a thing or person into a completely different one, by natural or supernatural means.
Metamorphosis
an internal skeleton, such as the bony or cartilaginous skeleton of vertebrates.
. Endoskeleton
(in an echinoderm) a network of water vessels in the body, the tube feet being operated by hydraulic pressure within the vessels.
Water vascular system
