invertebrate animals Flashcards
Vertebrates
Animals that have a backbone
Invertebrates
Animals that don’t have backbone
Consumer
organism that eats other organisms
Ganglion
a mass of nerve cells
Gut
the digestive tract
Coelom
a body cavity that contains the internal organs
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
Sponges, the members of the phylum Porifera, are a basal Metazoa clade as sister of the Diploblasts
Cnidarians
Cnidaria is a phylum containing over 10,000 species of animals found exclusively in aquatic environments: they are predominantly marine species.
Flatworms
The flatworms, flat worms, Platyhelminthes, Plathelminthes, or platyhelminths are a phylum of relatively simple bilaterian, unsegmented, soft-bodied invertebrates
Roundworms
The nematodes or roundworms constitute the phylum Nematoda. They are a diverse animal phylum inhabiting a broad range of environments
Mollusks
an invertebrate of a large phylum that 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
pump blood into a hemocoel with the blood diffusing back to the circulatory system between cells.
Closed circulatory system
have a closed circulatory system. Closed circulatory systems have the blood closed at all times within vessels of different size and wall thickness.
Annelid worms
The annelids, also known as the ringed worms or segmented worms, are a large phylum, with over 17,000 extant species including ragworms, earthworms, and leeches.
Exoskeleton
An exoskeleton is the external skeleton that supports and protects an animal’s body, in contrast to the internal skeleton of, for example, a human. In usage, some of the larger kinds of exoskeletons are known as “shells”
Compound eye
an eye consisting of an array of numerous small visual units, as found in insects and crustaceans.
Antenna
something on an ant
Metamorphosis
the process of transformation from an immature form to an adult form in two or more distinct stages.
a change of the form or nature of a thing or person into a completely different one, by natural or supernatural means.
Endoskeleton
an internal skeleton, such as the bony or cartilaginous skeleton of vertebrates
Water vascular system
(in an echinoderm) a network of water vessels in the body, the tube feet being operated by hydraulic pressure within the vessels.
