inverebrate voc Flashcards
Vertebrates
organisms which have an internal backbone surrounded by bone, also called vertebrae. T
Invertebrates
a cold-blooded animal with no backbone.
Consumer
any organism that can’t make its own food.
Ganglion
a collection of neuronal bodies found in the voluntary and autonomic branches of the peripheral nervous system (PNS)
Gut
the stomach or belly.
Coelom
the body cavity in metazoans, located between the intestinal canal and the body wall
Bilateral Symmetry
the property of being divisible into symmetrical halves on either side of a unique plane.
Radial Symmetry
symmetry around a central axis, as in a starfish or a tulip flower.
Asymmetry
lack of equality or equivalence between parts or aspects of something; lack of symmetry.
sponges
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.
cnidarians
an aquatic invertebrate animal of the phylum Cnidaria, which comprises the coelenterates.
flatworms
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.
Roundworms
a nematode, especially a parasitic one found in the intestines of mammals.
Mollusks
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.
Open circulatory system
the blood is not enclosed in the blood vessels, but is pumped into a cavity called a hemocoel.
