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Vertebrates Statements


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Vertebrates Statements

  1. 1. Milk Production All females have mammary glands which make milk for their young, and only these organisms suckle their young from mammary glands. Most of these babies suckle milk from their motherʼs teats. Some do not have teats so their babies suckle on hairs near the mammary glands. The young often stay with their mothers for an extended period of time, though they usually do not be feed on milk for the whole time. They mature more slowly than most other animals and need more looking after by their mothers to become healthy adults. Hair or Fur All have some component of hair or fur, something no other animal has. It may be coarse, stray hairs like on the chin of a whale or a thick, fur coat like on a bison. The coat of most of these organisms have guard hairs or longer hairs that protect the soft underhair. Guard hairs may develop into quills like you would see on a porcupine. Hair or fur is used to keep them warm and to help keep their body temperature constant, which is called being warm - blooded or endothermic. The underhairs provide most of this warmth. Some characteristics such as live birth and being warm-blooded, are shared by most mammals but may also be seen in other animals. Warm-Blooded (Endothermic) All are warm blooded, or endothermic, which means they can regulate their body temperature separately from the environment. For example, the musk ox can keep a body temperature well above the frigid temperatures of the arctic. These organisms must eat a lot more than ectothermic animals to make this body heat and they use their hair or fur to keep the heat from being lost to the environment. Live Birth Most give birth to live young as opposed to laying eggs. The young develop inside the mother and are nourished by a placenta. Cold Blooded These organisms are cold blooded so need to bask in the sunshine and use their environment to maintain their body temperature. Feathers These organisms are covered with feathers, varying from very small to quite large Lay eggs These organisms generally do not give birth to live young and instead lay eggs which need to hatch. Live on the water and on the land These organisms are unusual because they can live both on water and on the land at various stages of their life cycle
  2. 2. Breathe through Gills These organisms do not have lungs and instead get their oxygen through gills Beaks These organisms have beaks Smooth skin These organisms have smooth often slightly moist/slimy skin Rough Skin These organisms have rough bumpy dry skin and occasionally scales