What is an organ in fish that fills with gases from the bloodstream or digestive tract in order to allow it to stay afloat?
Swim bladder
What is the largest group of amphibians?
Frogs
Which reptiles have the smallest snouts of all the crocodilians?
What is the peripheral nervous system?
The nerves that run throughout the entire body.
How many chambers does a fish heart have?
Two (one atrium and one ventricle)
Reptiles and amphibian hearts have how many chambers?
Three
What are squamates?
Reptiles with loosely attached jaws
What are the large scale-like structures found on the top of turtles?
Scutes
What is spawning?
When the females lay eggs that the males then fertilize with sperm
In some animals, what is the opening for both the digestive and urogential tract?
Cloaca
What is the allantois of an egg?
The spot in the egg where metabolic wastes are stored.
Which type of fish lacks many characteristics of vertebrates? Give at least one example of this fish.
Jawless fishes
Ex. hagfish, lamprey
How do freshwater fish maintain osmoregulation?
Freshwater fish live in a hypotonic environment. Kidneys will remove excess water from the bloodstream and release it as urine.
What is the name for the legless, generally burrowing amphibians?
Caecilians
What is one thing about crocodiles that makes them unique from other reptiles?
They have a four-chambered heart (most reptiles only have three)
What is the difference between estivating and hibernating?
Estivate - becoming dormant in the summer
Hibernating - becoming dormant in the winter
Describe how cartilaginous fishes and bony fishes get water into their gills.
Cartilaginous fish have to constantly move (ram ventilation) in order to get water to flow over their gills.
Bony fish can pump water over their gills
What is the name for the process that frogs use for reproduction? Describe it.
Amplexus
When the male grasps the females from on top and behind
List four unique facts about reptilian reproduction
Some lay eggs, some bear live young
Reptile eggs are more leathery than bird eggs
Usually little parental care
In many reptiles, temperature around the egg determines the gender of the young
On the egg diagram, label: On the diagram, label: amniotic sac, shell, yolk sac, allantois, chorion, and embryo
