Vertebrates 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
are animals that neither possess nor develop a vertebral column, derived from the notochord. This includes all animals apart from the chordate subphylum Vertebrata. Familiar examples of invertebrates include arthropods, mollusks, annelid, and cnidarians.
Consumer
person or a group who intends to order, orders, or uses purchased goods, products, or services
Ganglion
a group of neuron cell bodies in the peripheral nervous system.
Gut
The gastrointestinal tract is the tract or passageway of the digestive system that leads from the mouth to the anus. The GI tract contains all the major organs of the digestive system, in humans and other animals, including the esophagus, stomach, and intestines.
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 Porifera, are a basal animal clade as a sister of the Diploblasts. They are multicellular organisms that have bodies full of pores and channels allowing water to circulate through them, consisting of jelly-like mesohyl sandwiched between two thin layers of cells.
Cnidarians
an aquatic invertebrate animal of the phylum Cnidaria, which comprises the coelenterates.
Flatworms
flat worms, Platyhelminthes, or platyhelminths are a phylum of relatively simple bilaterian, unsegmented, soft-bodied invertebrates.
Roundworms
The nematodes or roundworms constitute the phylum Nematoda, with plant-parasitic nematodes also known as eelworms. They are a diverse animal phylum inhabiting a broad range of environments.
Mollusks
Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda. The members are known as molluscs or mollusks. Around 85,000 extant species of molluscs are recognized. The number of fossil species is estimated between 60,000 and 100,000 additional species.
. 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.
