Invertebrate Animals Flashcards
Vertebrates
an animal that has a backbone
Consumer
an organism that eats other organism
Ganglion
a mass of nerve cells
Gut
the digestive tract
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
the members of the phylum Proliferate, are a basal Metadata clad as sister of the Diplomatists
Cnidarians
an aquatic invertebrate animal of the phylum Cnidarian, which comprises the coelenterates.
Flatworms
are a phylum of relatively simple bilateral, unsegmented, soft-bodied invertebrates.
Roundworms
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
insects, mollusks and other invertebrates) pump blood into a hemlock with the blood diffusing back to the circulatory system between cells.
Closed circulatory system
are a few invertebrates, 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
he annelids, also known as the ringed worms or segmented worms, are a large phylum, with over 17,000 extant species including rag worms, earthworms, and leeches.
Exoskeleton
a rigid external covering for the body in some invertebrate animals, especially arthropods, providing both support and protection.
Compound eye
an eye consisting of an array of numerous small visual units, as found in insects and crustaceans
Antenna
either of a pair of long, thin sensory appendages on the heads of insects, crustaceans, and some other arthropods.
Metamorphosis
the process of transformation from an immature form to an adult form in two or more distinct stages.
Endoskeleton
an internal skeleton, such as the bony or cartilaginous skeleton of vertebrates.
Water vascular system
a network of water vessels in the body, the tube feet being operated by hydraulic pressure within the vessels
Invertebrates
an animal lacking a backbone, such as an arthropod, mollusk, annelid, coelenterate, etc. The invertebrates constitute an artificial division of the animal kingdom, comprising 95 percent of animal species and about 30 different phyla.
