PPT-What are mammals?

Basic characteristics Warm blooded Have a backbone Have hair or fur on their bodies Breathe in oxygen and breathe out carbon dioxide Have live babies do not lay eggs Feed babies with milk from their . What is a Mammal?. Mammals have a 4 chambered heart.. Mammals are warm-blooded.. They have hair/fur.. Have mammary glands.. Give birth to live young.. Pinnepeds. Pinnepeds are. . marine mammals that have flippers and blubber, that need to breed on land. . Monotremes. Luo. et al. (2002).. Node labeled 1 indicates our (stable) . clade. -based definition of . Mammalia. .. This is the commonly used crown-. clade. definition.. Luo. et al. (2002).. We’ll look first at the . Vertebrates. 350 m.y.a. vertebrates invaded land. Decendents of bony fish . Land vertebrates had to adapt to harsher conditions on shore. Tetrapods had to develop lungs that allowed for absorption of oxygen directly from air. . Pages 557 - 573. Mammalia is one of the smallest classes under . K. ingdom Animalia. However, it contains most of what we call “animals” today. Mammalia also contains humans. There are 26 orders under Class Mammalia (12 are under placental mammals). Chapter 34. What is a mammal?. Endothermic vertebrate. Amniotic egg. Four chambered heart. Synapomorphies of Mammalia. Mammary glands. Hair. _____ . inner ear bones. Neocortex region of brain. Single . Chapter 16. Birds. Birds belong to the class Aves.. Aves comes from the Latin word for bird. .. First appeared on Earth 150 million years . ago. Section 1. Bird Characteristics. S. hare some characteristics with reptiles. Marine Vertebrates:. Mammals. Marine Mammals. Carnivora. Sea otters, polar bears. Pinnipeds. Seals, sea lions, walruses. Sirenians. Manatees, . dugongs (sea cows). Cetaceans. Porpoises, dolphins, whales. Introduction. I´m. . going. . to. . talk. . about. :. Mammals. .. What. . they. . eat. .. Their. . body. . covering. .. What. are . they. .. How. . they. reproduce. . AND. HUMAN BEINGS. Integument & Derivatives. Skin is thicker than other vertebrates. Epidermis – thinner, protected by hair. Dermis – thicker. Glands. Sweat Glands. Eccrine glands. Secrete a watery fluid, draws heat away when evaporated . Birds. Birds belong to the class Aves.. Aves comes from the Latin word for bird. .. First appeared on Earth 150 million years . ago. Section 1. Bird Characteristics. S. hare some characteristics with reptiles. Gregg Thomas. Indiana University. SMBE 2014. Convergent evolution is observed at the phenotypic level. Porcupine. (. Rodentia. ). Echidna. (. Monotremata. ). Hedgehog. (. Erinaceomorpha. ). 2. Predictable Evolution. Characteristics of mammals. Characteristics of mammals. All mammals have the following in common:. 1. Are . endothermic . 2. Hair. 3. Specialized . teeth. 4. PARENTAL CARE- Females . produce milk in . Ancestors that dominated the Permian And Early Triassic. “Triassic Takeover”. . - Dominance of dinosaurs may have driven some . therapsids. to a nocturnal, insectivorous lifestyle.. . - this may have selected for hair and . One type of animal that made a successful and complete transition from land to water in the course of its evolution is the whale. .. . The According to the fossil record, about 50 million years ago some terrestrial mammals began to make the transition from a life on land to a life in the sea. .