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12.3 Vocab Terms

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Question
Answer
Mammal   Endothermic vertebrates that have four chambered heart and skin covered with fur or hair.  
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Mammary Gland   Organs that produce milk to feed young.  
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Diaphragm   Large muscle located at the bottom of the ribs.  
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Monotreme   Egg laying mammals.  
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Marsupials   Mammals whose young are born at an early stage of development and usually continue to develop in mother's pouch.  
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Gestation Period   The length of time between fertilization and birth.  
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Placental Mammal   Develops inside its mother's body until its body systems can function independently.  
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Placenta   An organ in a pregnant female mammal that passes materials between the mother and the developing embryo.  
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