Cranial capacity is a measure of the volume of the interior of the cranium (also called the braincase or brainpan) of those vertebrates who have both a cranium and a brain. The most commonly used unit of measure is the cubic centimetre or cc. The volume of the cranium is used as a rough indicator of the size of the brain, and this in turn is used as a rough indicator of the potential intelligence of the organism. However, larger cranial capacity is not always indicative of a more intelligent organism, since larger capacities are required for controlling larger more muscular bodies, or in some cases are an adaptive feature for life in a colder environment. My professor used this definition in a university physical science class so it must be right. Thanks Dr. Ash. Cranium can mean: The brain and surrounding skull, a part of the body. ... Typical classes Petromyzontidae (lampreys) Placodermi - extinct Chondrichthyes (cartilaginous fish) Acanthodii - extinct Actinopterygii (ray-finned fish) Actinistia (coelacanths) Dipnoi (lungfish) Amphibia (amphibians) Reptilia (reptiles) Aves (birds) Mammalia (mammals) Vertebrata is a subphylum of chordates, specifically, those with backbones or spinal columns. ... For other uses, see Brain (disambiguation). ... A cubic centimetre (cm3) is an SI derived unit of volume, equal to the volume of a cube with side length of 1 centi metre. ...

Examples of cranial capacity:

• Orangutans: 275–500 cc
• Chimpanzees: 275–500 cc
• Gorillas: 340–752 cc
• Humans: 1100–1700 cc
• Neanderthals: 1200–1700 cc

Examples of early hominids: This article is about the primate. ... Type species Simia troglodytes Blumenbach, 1775 distribution of Species Pan troglodytes Pan paniscus Chimpanzee, often shortened to chimp, is the common name for the two extant species in the genus Pan. ... Type species Troglodytes gorilla Savage, 1847 distribution of Gorilla Species Gorilla gorilla Gorilla beringei The gorilla, the largest of the living primates, is a ground-dwelling omnivore that inhabits the forests of Africa. ... This article is about modern humans. ... For other uses, see Neanderthal (disambiguation). ... Genera The hominids are the members of the biological family Hominidae (the great apes), which includes humans, chimpanzees, gorillas, and orangutans. ...

Binomial name Johanson & White, 1978 Australopithecus afarensis is an extinct hominid which lived between 3. ... Binomial name Dart, 1925 Australopithecus africanus was an early hominid, an australopithecine, who lived between 2-3 million years ago in the Pliocene. ... It has been suggested that this article or section be merged with Paranthropus boisei. ... Species Paranthropus aethiopicus Paranthropus boisei Paranthropus robustus Paranthropus , is a fossil primate first found in Bulgaria. ... Binomial name Leakey et al, 1964 Homo habilis (IPA ) (handy man, skillful person) is a species of the genus Homo, which lived from approximately 2. ... Binomial name †Homo rudolfensis Alexeev, 1986 Homo rudolfensis is a fossil hominin species proposed in 1986 by V. P. Alexeev for the specimen Skull 1470 (KNM ER 1470)[1]. Originally thought to be a member of the species Homo habilis, the fossil was the center of much debate concerning its... Binomial name †Homo ergaster Groves & Mazak, 1975 Homo ergaster (working man) is an extinct hominid species (or subspecies, according to some authorities) which lived throughout eastern and southern Africa between 1. ...

See also

• Brain to body mass ratio
• Craniometry
• Human evolution
• Neuroscience and intelligence

Brain to body mass ratio (also known as the Encephalization Quotient or EQ) is a rough estimate of the possible intelligence of an organism. ... This article does not cite its references or sources. ... // For the history of humans on Earth, see History of the world. ... // When comparing different species brain size does present a correlation with intelligence. ...

References

• McHenry, Henry M. [2002]. "23: Introduction to the fossil record of human ancestry", in Walter C. Hartwig: The Primate Fossil Record (in English). Cambridge University Press, 402. 0521663156. 
• Lynn, R. (2006). Race Differences in Intelligence: An Evolutionary Analysis. ISBN 1-59368-021-X.