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A mammal (from Latin mamma 'breast') [1] is a vertebrate animal of the class Mammalia (/ m ə ˈ m eɪ l i. ə /). Mammals are characterised by the presence of milk-producing mammary glands for feeding their young, a broad neocortex region of the brain, fur or hair, and three middle ear bones.
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The size of the kidneys increases with the mass of mammals, and the number of nephrons in the kidneys between mammals increases allometrically. [92] In mice, the kidneys are approximately 1 cm (0.4 in) long, weighing 400 mg, with 16,000 nephrons, while in the killer whale , the kidney length exceeds 25 cm (10 in), the mass is approximately 4.5 ...
Among extinct animals, most early mammals such as pantodonts were plantigrade. A plantigrade foot is the primitive condition for mammals; digitigrade and unguligrade locomotion evolved later. Among archosaurs, the pterosaurs were partially plantigrade and walked on the whole of the hind foot and the fingers of the hand-wing. [ 1 ]
A mammal (from Latin mamma 'breast') is a vertebrate animal of the class Mammalia (/ m ə ˈ m eɪ l i. ə /). Mammals are characterised by the presence of milk -producing mammary glands for feeding their young, a broad neocortex region of the brain, fur or hair , and three middle ear bones .
Ages: 3+ Bring the GOAT Star Wars villain to life with this 2-foot tall Darth Vader toy. In addition to lights and sounds, his right arm has an extendable lightsaber, and his left fist opens to ...
Kneading (also known rather adorably as ‘making biscuits’) is a key sign of affection and is wonderfully relaxing for both cat and human — as long as you have a blanket over your lap that is ...
NOMV started as a Facebook Group, but in the 10 years since its founding has grown into a 501(c)3 non-profit organization, providing peer support, education initiatives, and other forums for ...