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Module #16

Vocabulary for Module #16: Reptiles, Birds, and Mammals

QuestionAnswer
Amniotic egg A shelled, water-retaining egg that allows reptile, bird, and certain mammal embryos to develop on land
Neurotoxin A poison that attacks the nervous system, causing blindness, paralysis or suffocation
Hemotoxin A poison that attacks the red blood cells and blood vessels, destroying circulation
Endotherm An organism that is internally warmed by a heat-generating metabolic process
Down feathers Feathers with smooth barbules but not hooked barbules
Placenta A structure that allows an embryo to be nourished with the mother's blood supply
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
Contour feathers Feathers with hooked and smooth barbules, allowing the barbules to interlock
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