Rod-like, supportive structure that runs along the dorsal midline of all larval chordates and many adult chordates
Evolutionary change that results in the formation of a number of new characteristics from an ancestral form.
A cover. The cover of a gill chamber of a bony fish.
Lateral Line System
A line of sensory receptors along the side of some amphibians used to detect water movement.
A gas-filled sac, usually along the dorsal body wall of bony fishes that regulates the buoyancy of a fish.
A receptor stimulated by the presence of certain chemical substances
Organisms that lay eggs that develop outside the body of a female.
Organisms with eggs that develop within the female reproductive tract and is nourished by food stored in the egg.
Organisms with eggs that develop within the female reproductive tract and is nourished by the female.
Paraphyletic group of vertebrates whose members lack jaws and paired appendages and possess a cartilaginous skeleton.
The class of vertebrates whose members are fish-like, possess paired appendages and a cartilaginous skeleton, and lack a swim bladder.
Class of fishes whose members are characterized by a bony skeleton, swim bladder, and an operculum.
Class of vertebrates whose members are characterized by skin with mucoid secretions, which serves as a respiratory organ.
A common opening for excretory, digestive, and reproductive systems
Tube conveying urine from the kidneys to the bladder.
The thin, transparent lower eyelid of amphibians and reptiles
The egg of reptiles, birds, and mammals. It has extra embryonic membranes that help prevent desiccation, store wastes, and promote gas exchange. These adaptations allowed vertebrates to invade terrestrial habitats
One of the extra embryonic membranes of reptiles, birds, and mammals. The amnion encloses the embryo in a fluid filled sac.
One of the extra embryonic membranes in the embryo of an amniote
The outer most extra embryonic membrane of the embryo of an amniote. Becomes highly vascular and aids in gas exchange
Having a body temp. determined by heat derived from the animals' own metabolism.
Having a variable body temperature derived from heat acquired from the environment.
Feathers that line the tip and trailing edge of the wing of a bird. They are asymmetrical with longer barbs on one side of the shaft
A surface, such as a wing that provides lift by using currents of air it moves through.
A group of feathers on the wing of a bird that is supported by the bones of the medial digit. The alula reduces turbulent air flow over the dorsal surface of the wing.
The breast in female mammals. The mammary glands produce and secrete milk to nourish developing young.
The class of vertebrates whose members are at least partially covered by hair, have specialized teeth, and are endothermic. Young are nursed from mammary glands.
Structure by which an unborn child or animal attaches to its mothers' uterine wall and through which it is nourished.
Each arm of the blind-ending, y-shaped digestive tract of trematodes, phylum Platyhelminthes.
The domed respiratory muscle between thoracic and abdominal compartments of mammals.
Period of development of the young in viviparous animals, from the time of fertilization of the ovum until birth
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Campbell biology Chapter 34 The Origin and Evolution of Vertebrates