Vertebrate and Invertebrate Animals Animals with a backbone are vertebrates. Mammals Some characteristics of mammals. 1. 2. 3. 4. 5. Have hair Live birth Produce milk for their young Stable body temperature High metabolic rate (high food and oxygen intake) 6. Four chamber heart 7. Well developed lungs Reptiles Some characteristics of reptiles. 1. Tough, dry, scaly skin 2. They are cold-blooded. 3. Reptiles produce shelled eggs or bear live young. 4. All species fertilize eggs internally. 5. All species of reptiles have at least one lung. 6. Sheds skin Amphibians Some characteristics of Amphibians • • • • • • Their skin is smooth and slimy. Amphibians breathe through their skin, as well as their lungs in some cases. Amphibians are cold-blooded. They have a complex life cycle (larval and adult stages). Many species of amphibians vocalize. One example is the chorus frog. Some species fertilize eggs externally, some internally. Fish Some characteristics of fish. 1. 2. 3. 4. Covered in scales Cold blooded Fins use gills to take oxygen from water 5. Most Lay eggs to produce young Birds Some characteristics of birds. 1. 2. 3. 4. horny beak, no teeth large muscular stomach feathers Lay eggs to produce young. The parent bird provides extensive care of the young until it is grown, or gets some other bird to look after the young. 5. strong skeleton/hollow bones 6. most are able to fly Invertebrates are animals that do not have a backbone Arthropods • • • • • Insects Spiders Mites Horseshoe crabs scorpions Some characteristics of Arthropods 1. A hard outer body covering called an exoskeleton. 2. Specialized mouth parts 3. Jointed legs 4. Compound Eyes 5. Segmented body Mollusks Some characteristics of Mollusks 1. Soft-bodied 2. covered with protective mantle that may or may not form a hard shell 3. Have a muscular foot for movement which is modified into tentacles for squid & octopus 4. Complete, one-way digestive tract with a mouth & anus 5. have a distinct head with sense organs & brain 6. Have a scraping, mouth-like structure called the radula Worms Some characteristics of Worms 1. Long body 2. Mouth at one end/anus at the other 3. Body made up of segments 4. Simple nervous system 5. Poorly developed sense organs