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9 Cards in this Set

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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
Endothermic
A creature is endothermic if it has an internal mechanism by which it can regulate its own body temperature, keeping it constant.
Gestation
The period of time during which an embryo develops before being born
Mammary glands
Specialized organs in mammals that produce milk to nourish the young
Hemotoxin
A poison that attacks the red blood cells and blood vessels, destroying circulation
Neurotoxin
A poison that attacks the nervous system, causing blindness, paralysis, or suffocation
Placenta
A structure that allows nutrients and gases to pass between the mother and the embryo