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9 Cards in this Set

  • Front
  • Back
Amniotic Egg
an egg in which the embryo is protected by a membrane called an amnion. In addition, the egg is covered in a hard or leathery covering.
Contour feathers
feathers with hooked and smooth barbules, allowing the barbules to interlock
Down feathers
feathers with smooth barbules but no hooked barbules
A creature is endothermic if it has an internal mechanism by which it can regulate its own body temperature, keeping it constant.
the period of time during which an embryo develops before being born
a poison that attacks the red blood cells and blood vessels, destroying circulation
Mammory glands
specialized organs in animals that produce milk to nourish the young
a poison that attacks the nervous system causing blindness, paralysis, or suffocation
a structure that allows nutrients and gases to pass between the mother and the embryo