an animal whose body temperature changes with the temperature of its environment
an animal whose body temperature is maintained at a steady temperature
an internal gas-filled sac that helps fish to swim at different depths
the force water exerts upward on any underwater object
highly developed nervous system, ectotherms, external fertilization, closed circulatory system, fins, scales, gills, and make up about 50% of all vertebrates
What are 8 characteristics that almost all fish share?
What moves from the water to the blood as water flows over the gills in a fish?
What moves from blood to water in a fish?
eating (hunting and feeding)
What is most movement related to in fish?
nervous system and sense organs
What 2 things are highly developed in a fish?
jawless fish, cartilaginous fish, and bony fish
What are the 3 different types of fish?
mouth structure and type of skeleton
What 2 things does fish classification depend on?
no scales, gills, ectotherms, closed circulatory system, highly developed nervous system, no paired fins, skeleton is made of cartilage, live in only salt water, no jaws, and are either scavengers or parasites
What are 10 characteristics that all jawless fish share?
skeleton is made of cartilage, ectotherms, highly developed nervous system, gills, closed circulatory system, have jaws, pointed scales, fins, live in only salt water, and carnivores
What are 10 characteristics that all cartilaginous fish share?
skeleton of hard bone, ectotherms, closed circulatory system, highly developed nervous system, fins, scales, gills, swim bladder, represent 95% of all fish, fresh and salt water environments
What are 10 characteristics that all bony fish share?
smaller chamber of the heart. receives blood
larger chamber of the heart. pumps blood out of the heart
the specific environment where an animal lives
opening to the lungs in the back of the mouth
tube leading to the stomach
tubes that lead from the ear to the throat/ equalize the air pressure in the ears
ear drum/ located behind the eyes
produces bile that is used in digestion
produces insulin in digestion
stores bile-chemical that helps break down food
begins the digestive process
area of gas exchange
insolation/keeps internal organs warm/source of energy
stores blood/recycles blood
filters blood and produces urine
most digestion of food takes place
most water is taken up into the body here/produces solid waste
amphibians spend their larval stage in water and their adult life on land
Why is it said that amphibians have a double life?
amphibian's movement: have legs and muscular limbs to get around/ fish's movement: uses fins to swim in water/ amphibian's skeleton: very strong/ fish's skeleton: could be made out of cartilage
Compare an adult amphibian's skeleton and method of moving to those of a fish.
the area becomes drier and amphibians need a moist environment/ amphibians have extremely thin skin, so they are sensitive to changes in the environment
How has forest destruction affected amphbians? Why has it had this effect?
a salamander needs to either breathe from lungs or its skin, so if it can not breathe through either of those, it can not survive
Why can a lung-less salamander not survive if its skin dries out. Explain why.
where do amphibians start their life?
where do amphibians spend their adult life?
in the lungs and through their skin
where do amphibians obtain oxygen?
thin and moist skin
what type of skin do amphibians have?
how many chambers does an amphibian have in their heart?
how many atria does an amphibian have?
how many ventricles does an amphibian have?
what does the atria do?
one atrium receives blood from body/the other atrium received blood from the lungs
what two places does the atria receive blood?
what does the ventricle do?
the body and the lungs
what two places does the ventricle pump blood to?
what happens to oxygen-rich and oxygen-poor blood in the ventricle?
external and internal
what type of fertilization does the amphibian exhibit?
what are eggs coated with?
keeps the eggs moist and frees the eggs from infection
what does the jelly that coats the eggs do?
Do parents care for the eggs or larva?
what do amphibians undergo from larva to adult stage?
Do frogs/toads-tadpoles resemble the adult?
Do salamanders resemble the adult?
strong skeleton and muscular limbs
What two things do amphibians have to move on land?
What kind of eyes do amphibians have?
Can amphibians close their eyes?
amphibians have thin skins and no shells on their eggs
What are two reasons why environmental poisons are dangerous to amphibians?
weaken adult and young amphibians, kill amphibian eggs, and cause tadpoles to be deformed
List three effects environmental poisons can have on amphibian development.
1. fertilized eggs 2. legless tadpole 3. hind legs develop 4. front legs develop 5. adult frog
What are the five stages of metamorphosis in a frog?