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Crucigrama Sopa de Letras Hoja de Trabajo
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Vertebrates

Horizontales
sensory system in fish that allows them to sense distant movements in the water (2 words)
any animal having, at some stage in development, a hollow nerve cord, notochord, pharyngeal slits, and tail
organism that produces its own heat through metabolic processes
flow of water opposite that of the flow of blood in a fish's gills (2 words)
air-filled space that connects to a bird's lungs, aiding in breathing (2 words)
flexible skeletal support rod embedded in an animal's back
mammal whose young complete fetal development in the mother's external pouch
vertebrate whose embryo or fetus is enclosed by a thin, tough membranous sac
respiratory organ of aquatic animals that allows breathing underwater
Verticales
mammal whose offspring complete fetal development in laid eggs
organ that develops in female mammals during pregnancy and carries nutrients from the motheer to the embryo
gland that produces milk (2 words)
internal skeleton built of bone or cartilage
buoyancy organ that helps fish to swim at different depths in the water (2 words)
protective bony plate that covers a fish's gills
aquatic larva of frogs or toads
organism that regulates its body temperature by exchanging heat with its environment
vertebrate with four limbs
mammal that gives birth to live young that have completed fetal development
surface whose shape moves air faster over the top than underneath it, allowing for flight