The Dolphin's Brain To Body Size Is Second Only To What Animal?

What Mammals Have the Biggest Brains?

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Brain size is an important part of animal anatomy, and has been studied past scientists as a potential indicator for intelligence. Brain size is typically adamant past weight, although information technology can as well exist measured by skull volume. While encephalon size is often related to body size, the ratio of brain mass to trunk mass is not always the same.

Sperm Whale

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The largest mammalian encephalon belongs to the sperm whale, one of the biggest cetaceans in the ocean. The sperm whale's head comprises 25 to 35 percent of its entire body length. The mature developed sperm whale's encephalon weighs an average of 18 pounds, and can grow to be most 500 cubic inches in size. For comparison, the human brain is simply about eighty cubic inches. Compared to the exceptional size of the sperm whale, notwithstanding, the brain itself is not that large: the brain mass is only .02 per centum of the total torso mass.

Elephant

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The brain of the elephant is the largest independent past whatever living country-dwelling mammal. The adult male elephant's encephalon can abound to be a whopping 12 pounds. As with the sperm whale, the encephalon accounts for relatively picayune of the elephant'southward total body mass. The elephant'south brain accounts for roughly .1 percentage of its mass, and is uniquely located at the back of its caput, not at the front.

Dolphin

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Dolphins, known every bit highly intelligent creatures, accept a encephalon size and encephalon-mass-to-body-mass ratio much like that of humans. While the dolphin's brain weight is just to a higher place that of the man encephalon at iii.5 pounds, the encephalon makes up about 1.xix percent of the total body mass, slightly less than that of a human. A dolphin, similar a human, has a large neocortex in comparing to other animals. The neocortex is the portion of the encephalon responsible for thinking and superior cognitive functions.

Human being

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Humans brand the list of largest brains by possessing a brain that can weigh upward to three.1 pounds, and that accounts for around 2.one percent of the body. The human being brain has three master parts: the cerebrum (forebrain), cerebellum (midbrain) and brain stem (hindbrain). The cerebrum contains the neocortex, and is the largest and most recognizable section of the brain. The human encephalon is divided into two hemispheres, and each controls the opposite side of the torso: the left hemisphere controls the right side of the body, and the right hemisphere controls the left.

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