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Mammal

Definition

noun, plural: mammals

Any of the endothermic vertebrates belonging to class Mammalia, which are identifiable by the following characteristics: a neocortex, three middle ear bones, a lower jaw made of a single bone, a hairy body covering, a thoracic diaphragm, a four-chambered heart, and females that are mostly viviparous


Supplement

Monotremes, marsupials (e.g. kangaroos) and placentals (e.g. primates, elephants, dolphins, cattle, etc.) are examples of mammals. With the exception of the monotremes (which are oviparous), most female mammals are viviparous. Viviparous mammals give birth to live young and nourish their newborn with milk produced from their mammary glands. Mother monotremes do not have nipples; thus, they feed their young with milk through specialized ducts at their abdomen. In dayak fruit bats, males are the ones producing milk to nourish the young.


Word origin: Latin mamma ( breast)

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Please help me identify this cell

This is a 1000x image of a slide marked as "Areolar Tissue, Mammal" from my histology lab. The TA couldn't tell me what kind of cell this was in the center. The light purple oval with the small purple dot is the one that interests me. Is the dot ...

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by Marauder21
Thu Apr 10, 2014 5:01 am
 
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by JackBean
Mon Feb 17, 2014 12:46 pm
 
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Fossil rabbits in the Precambrian!

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by Steiner
Sun Dec 22, 2013 8:25 pm
 
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Re:

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by NMLevesque
Wed Nov 20, 2013 10:10 pm
 
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Are bidirectional lungs essential for human speech?

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by JackBean
Wed Nov 20, 2013 7:22 pm
 
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