invertebrate Flashcards
Vertebrates
An animal of a large group distinguished by the possession of a backbone or spinal column, including mammals, birds, reptiles, amphibians, and fishes.
Invertebrates
Invertebrates are animals that neither possess nor develop a vertebral column, derived from the chordate.
Consumer
A living creature that eats organisms from a different population.
Ganglion
A small cystic tumor connected either with a joint membrane or tendon sheath.
Gut
The portions of the alimentary canal, particularly the stomach and the intestines.
Coelom
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
The lack or absence of symmetry.
Sponges
Have a porous skeleton.
Cnidarians
Include the corals, hydras, jellyfish, Portuguese men-of-war, sea anemones, sea pens, sea whips, and sea fans. sea anemone.
Flatworms
A group of soft-bodied, usually much flattened invertebrates.
Roundworms
Any worm of the phylum Nematoda.
Mollusks
Usually wholly or partly enclosed in a calcium carbonate shell secreted by a soft mantle covering the body.
Open circulatory system
Systems where blood, rather than being sealed tight in arteries and veins, suffuses the body and may be directly open to the environment at places such as the digestive tract.
