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Review for test # 12

Horizontales
An animal that requires water but can be out of it for periods of time.
"tail" of an aquatic mammal
A type of scale found in sharks, rays, and skates
The only mammals that can fly
How many chambers does a frog heart have?
What is the defining characteristic of vertebrates?
How many chambers does an eagle heart have?
Animals that have immature young that then develop in a pouch
What compound makes up the spine of the chondrichthyes
The loop of blood vessels that takes blood to the body and back.
Verticales
The process which uses a placenta to provide nutrients to it embryos
What organism has no jaw?
The process of using sound waves to locate objects
Required by amphibians for the eggs and respiration
Animals that can maintain their own body temperature
Animals that rely on the environment to help regulate their temperature
An animal that has a single bone mandible
The type of egg that reptiles, birds and some mammals lay
The loop of blood vessels that takes blood to and from the lungs
A hole which allows dolphins, whales and porpoises to breath
Help birds fly and provide extra oxygen
The organ that does gas exchange for agnatha, chondrichthyes, and osteichthyes
How many chambers does a fish heart have?