a statement about a phenomenon that is objectively verified, and thus, considered to be true.

when an animal assumes a form of bipedalism on a temporary basis in order to perform a particular action.

in taxonomic classifications, all members of the same Genus but only certain members of an Order.

animals.

the thigh bone.

stage in human development that lasts between 10 weeks after conception until birth.

lateral (outer) bone of the lower leg.

counting from the top, the firth vertebra forming the neck.

counting from the top, the firth vertebra forming the lower back.

a true rib; counting from the top, the fifth rib forming the rib cage.

counting from the top, the fifth vertebra forming the mid back.

[syn. atlas] the vertebra on which the skull rests and articulates with the axis.

vertebra forming part of the lower back.

a true rib; it is the shortest, borades, and most curved rib.

counting from the top, the first vertebra forming the mid-back.

the movement that results in the angle between skeletal elements getting smaller. Different muscles act to flex or extend different skeletal elements. See also extension.

plants.

a dietary category that describes animals that specialize in eating primarily foliage, such as leaves.

a hole or opening in a tissue, such as bone; usually accommodates the passage of a blood vessel or a nerve.

the large hole in the occipital bone that allows for the passage of the spinal cord to the brain. The placement of the foramen magnum in the skull is an indication of bipedal or quadrupedal behavior.

formed when hard elements of a skeleton, such as shells, teeth and bones, are quickly buried by sand or mud. Over the thousands or millions of years these elements are buried, the organic components of the skeleton are replaced with minerals. The transition from bone to stone forms a fossil.

when a portion of a population is geographically isolated, and due to the small sample size subsequent generations no longer represent the genetic diversity seen in the original population.

counting from the top, the fourth vertebra forming the neck.

counting from the top, the fourth vertebra forming the lower back.

a true rib; counting from the top, the fourth rib forming the rib cage.

counting from the top, the fourth vertebra forming the mid-back.

a break or crack in a bone or cartilage.

a plane defined by the most inferior points on the anterior margins of the left orbit and the middle points of the upper part of the left and right external auditory meatus (porion); also called the Plane of Virchow.

the forehead.

a dietary category that describes animals that specialize in eating primarily fruit.

the study of the relationship between an organism's lifestyle and its anatomy.