← fish and amphibians test (tuesday) Export Options Alphabetize Word-Def Delimiter Tab Comma Custom Def-Word Delimiter New Line Semicolon Custom Data Copy and paste the text below. It is read-only. Select All an animal whose body temperature changes with the temperature of its environment ectotherm an animal whose body temperature is maintained at a steady temperature endotherm an internal gas-filled sac that helps fish to swim at different depths swim bladder the force water exerts upward on any underwater object buoyant force 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? oxygen What moves from the water to the blood as water flows over the gills in a fish? carbon dioxide 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 atrium larger chamber of the heart. pumps blood out of the heart ventricle the specific environment where an animal lives habitat opening to the lungs in the back of the mouth glottis tube leading to the stomach esophagus tubes that lead from the ear to the throat/ equalize the air pressure in the ears eustachian tube ear drum/ located behind the eyes tympanum produces bile that is used in digestion liver produces insulin in digestion pancreas stores bile-chemical that helps break down food gallbladder begins the digestive process stomach area of gas exchange lungs insolation/keeps internal organs warm/source of energy fat body stores blood/recycles blood spleen stores urine bladder filters blood and produces urine kidney most digestion of food takes place small intestine most water is taken up into the body here/produces solid waste large intestine 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. in water where do amphibians start their life? on land 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? three how many chambers does an amphibian have in their heart? two how many atria does an amphibian have? one how many ventricles does an amphibian have? receives blood 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? pumps blood what does the ventricle do? the body and the lungs what two places does the ventricle pump blood to? it mixes what happens to oxygen-rich and oxygen-poor blood in the ventricle? external and internal what type of fertilization does the amphibian exhibit? jelly what are eggs coated with? keeps the eggs moist and frees the eggs from infection what does the jelly that coats the eggs do? no Do parents care for the eggs or larva? metamorphosis what do amphibians undergo from larva to adult stage? no Do frogs/toads-tadpoles resemble the adult? yes Do salamanders resemble the adult? strong skeleton and muscular limbs What two things do amphibians have to move on land? large eyes What kind of eyes do amphibians have? yes 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?