2. CHAPTER 18 SECTION 2 NOTES AMPHIBIANS: SPEND PART OF THEIR LIVES IN WATER AND PART ON LAND EX…..FROGS, TOADS, NEWTS, SALAMANDERS

3. AMPHIBIAN ADAPTATIONS: ECTOTHERMS (ADJUST TO CHANGING TEMPERATURE OF THEIR ENVIRONMENT HIBERNATE IN COLD WEATHER ESTIVATION – (UNDERGROUND)…PERIOD OF INACTIVITY DURING HOT, DRY SUMMER MONTHS

4. AMPHIBIAN CHARACTERISTICS: STRONG ENDOSKELETON MADE OF BONES ADUTLS USE LUNGS (IMPORTANT ADAPTATION FOR SURVIVAL ON LAND) 3 CHAMBER HEARTS CAN LIVE ON LAND, BUT MUST STAY MOIST FOR THE CARBON DIOXIDE/OXYGEN EXCHANGE HEARING AND VISION ARE ADAPTED TO LIFE ON LAND LONG, STICKY TONGUE

5. AMPHIBIAN METAMORPHOSIS: EGGS ARE LAID MOST OFTEN IN WATER AND HATCH INTO LARVAE MOST ADULTS LIVE ON LAND DEPENDS ON THE SPECIES, WATER TEMPERATURE, AND THE AMOUNT OF AVAILABLE FOOD EXTERNAL FERTILIZATION REQUIRES WATER FOR REPRODUCTION

6. REPTILES: ECTOTHERMIC WITH DRY, SCALEY SKIN MOST LIVE THEIR ENTIRE LIFE ON LAND EX……SNAKES, LIZARDS, TURTLES, CROCODILES

7. TYPES OF REPTILES: (1)TURTLES – HARD SHELL, INTO WHICH THEY DRAW FOR PROTECTION (2)ALLIGATORS & CROCODILES – PREDATORS (3)LIZARDS & SNAKES – LARGEST GROUP OF REPTILES - HIGHLY DEVELOPED SENSE OF SMELL

8. REPTILE ADAPTATIONS: THICK, DRY WATERPROOF SKIN COVERED WITH SCALES THAT REDUCE WATER LOSS AND HELP PREVENT INJURY HAVE LUNGS AND A NECK INTERNAL FERTILIZATION LAYING SHELL-COVERED AMNIOTIC EGGS