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| The order of mammals that has a complex of characteristics related to an inital adaptation to life in the trees. |
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| A vertebrate phylum consisting of organisms that possess a notochord at some period during their life. |
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| A flexible internal rod that runs along the back of an animal. |
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| A subphylum of the phylum Chordata, defined by the presence of an internal, segmented spinal column and bilateral symmetry. |
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| Symmetry in which the right and left sides of the body are approximately mirror images. |
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| An organ that develops inside a pregnant placental mammal that provides the fetus with oxygen and food and helps filter out harmful substances. |
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| The period of life from conception until birth. |
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| The period of life from birth until death. |
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| An organism capable of maintaining a costant body temperature under most circumstances. |
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| Having different types of teeth. |
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| The chisel-shaped front teeth, used for cutting, slicing, and gnawing food. |
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| The teeth located in the front of the jaw behind the incisors, which are normally used by mammals for puncturing and defense. |
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| One of the types of back teeth, used for crushing and grinding food. |
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| The teeth farthest back in the jaw, used for crushing and grinding food. |
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| A short-hand method of describing the number of each type of tooth in one-half of the jaw in a mammal. |
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| The area of the forebrain that consists of the outermost layer of brain cells, associated with memory, learning, and intelligence. |
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| A biological structure adapted to a narrow range of conditions and used in very specific ways. |
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| A biological structure adapted to a wide range of conditions and used in very general ways. |
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| Binocular Stereoscopic Vision |
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Definition
| Overlapping fields of vision with both sides of the brain receiving messages from both eyes, thereby providing depth perception. |
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| Strepsirrhini (strepsirhines) |
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Definition
| One of two suborders of primates. Strepsirhines are primates that have a moist nose (lemurs and lorises). |
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| Haplorrhini (haplorhines) |
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| One of two suborders of primates. Haplorhines are primates without a moist nose (tarsiers, monkeys, apes, and humans). |
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| The bony ring that separates the eye orbits from the back of the skull in strepsirhines. |
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| A nocturnal strepsirhine found today in Asia and Africa. |
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| A strepsirhine found today on the island of Madagascar. |
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| A nocturnal haplorhine found today in Indonesia. |
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| A group of haplorhine primates consisting of monkeys, apes, and humans. |
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| Anthropoids native to the New World that have broad and flat noses with nostrils on the side. This group consists of New World monkeys. |
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| Anthropoids native to the Old World that have narrow noses with downward-facing nostrils. This group consists of Old World monkeys, apes, and humans. |
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| A form of movement in which all four limbs are of equal size and make contact with the ground, and the spine is roughly parallel to the ground. |
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| A superfamily of anthropoids consisting of apes and humans. |
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| A raised area on the chewing surface of a tooth. |
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| The ability to raise the arms above the head and hang on to branches and to climb in this position. |
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| A family (Hominidae) within the hominoids. |
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| The subfamily of hominoids that includes humans, chimpanzees, and bonobos. |
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| Humans and their ancestors since the time of divergence from the common ancestor of humans, chimpanzees, and bonobos. |
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