Phylum Chordata - Class Mammalia
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Phylum Chordata - Class Mammalia

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Phylum Chordata - Class Mammalia Phylum Chordata - Class Mammalia Presentation Transcript

  • Mammals are endothermic amniotes that possess mammary glands and hair (fur)‏ Mammary glands – produce milk (females only)‏ for offspring Hair – made out of the protein keratin ; helps maintain endothermy There are three groups of mammals
  • While most mammals give birth to young, the monotremes are egg-laying mammals
  • Marsupials – pouched mammals that give birth to undeveloped embryos that then develop inside a pouch
  • Placental mammals – embryo develops inside the mother’s uterus where an organ called the placenta provides the embryo with nutrients and oxygen and removes waste products
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