Organ system that defends the body from pathogens and other disease causing agents

Tough tissue that contains a protein called collagen

Hard tissue that consists of collagen matrix filled in with minerals

Skull, protects the brain, included in a vertebrate endoskeleton

Organs that filter wastes from blood so they can be excreted from the body

Aquatic, vertebrates, most ectothermic, covered with scales, gills fins, stream-lined body, swim bladder

Large group of adults come together to release their gametes into the water at the same time, increases the chances of fertilization

Balloon-like internal organ that contains gas

Vertebrates with four limbs

Vertebrates, life is divided between freshwater and terrestrial life, appendages, vertebrates with four limbs, ectothermic

Tough, fibrous protein found in skin, scales, feathers, hair, and nails of tetrapod vertebrates

Large muscle below the lungs, controls breathing

Tetrapod vertebrates, produce amniotic eggs, include crocodiles, alligators, lizards, snakes, turtles, scales, lungs, one of the largest class of vertebrates

Endothermic, tetrapod vertebrates, bipedal, lay amniotic eggs, wings, feathers, beaks, majority can fly

Brooding, after eggs are laid they are kept warm by body heat while embryos continue to develop