Dogs' lips are black because of pigmentation. For instance, if you were to shave a tiger, you would find that its stripes are not just in the fur, but in its very skin. Oh, pigmentation is just a way of saying color.
Dog lips follow dog noses. If you look, you'll notice that dogs noses come mainly in black, but some other shades (brown on the Golden Retriever, for example) as well. Dog lip colors by and large match their nose colors, and for good reason. Noses and lips are both made of mucous membranes, and so are very anatomically similar.
well hope i helped =)Why do dogs have black lips?
dogs' lips are black because of pigmentation. Animal pigmentation is a fascinating field of study, sadly underappreciated by the lay public. For instance, if you were to shave a tiger, you would find that its stripes are not just in the fur, but in its very skin. I strongly advise against doing this yourself, since tigers do not like being bald and resist the proceedure most strenously. And your HMO might, like mine, have an exception to coverage due to shaving felines in their contract. So take my word for it and save yourself a painful disemboweling. Oh, pigmentation is just a fancy way of saying color, but the medical field loves fancy words for simple ideas.
Also, MAYBE, dogs don't have blood coming to their lips. That's why our lips are red. Dogs MIGHT not have blood to their lips.
Well think of wolves. All dogs are desendents ( yes even toy breeds!!) from this animal. Wolves have black lips to be able to be hidden so that they can stalk and kill their prey.
In HUMANS,that a secondary SEXUAL trait...makes males think of more southern lips Humans are APES!
Dogs are NOT programmed that way...because they are DOGS.
Ta-Dah!!
It's just pigmentation.
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