invertebrate Flashcards
(23 cards)
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.
Closed circulatory system
Comprised of the heart that pumps blood into the vessels to reach the tissues and organs.
Annelid worms
Any member of a phylum of invertebrate animals that are characterized by the possession of a body cavity.
Exoskeleton
Rigid or articulated envelope that supports and protects the soft tissues of certain animals.
Compound eye
A visual organ found in arthropods such as insects and crustaceans.
Antenna
One of a pair of slender, movable, segmented sensory organs on the head of insects, myriapods, and crustaceans.
Metamorphosis
Striking change of form or structure in an individual after hatching or birth.
Endoskeleton
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.
