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| afferent |
bearing or leading toward a central organ or part, as nerves that conduct impulses to the spinal column or as veins that carry blood to the heart. |
| backbone |
the series of bones that run along the center of the back; spinal column; vertebrae. [1/3 definitions] |
| chiropractic |
a system of healing in which manipulation of the spinal column and other body structures is used to restore normal nerve function and thus good health. |
| coccyx |
the small triangular bone at the lower end of the spinal column, consisting of several fused vertebrae. |
| invertebrate |
without a spinal column or backbone; not vertebrate. [1/3 definitions] |
| notochord |
a rod-shaped grouping of cells that forms the central supporting structure of chordate animals and of the embryos of vertebrates, in which it develops into the spinal column. |
| pelvis |
in many vertebrates, the basinlike structure formed by the hipbones and other bones that form a ring near the base of the spinal column. [1/2 definitions] |
| rachis |
the spinal column. [1/3 definitions] |
| spina bifida |
a congenital defect in which part of the spinal cord protrudes from the spinal column, often resulting in severe neurological disorders. |
| spinal cord |
the thick cord of nerve tissue that extends through the inner canal of the spinal column from the base of the brain to the end of the spine of any vertebrate animal. |
| spine |
the backbone in vertebrates; spinal column. [1/4 definitions] |
| tail |
an animal's rearmost part, usu. an appendage and extension of the spinal column, that projects from the rear of the trunk. [1/13 definitions] |
| vertebra |
one of the small bones or segments of cartilage that form the spinal column. |
| vertebrate |
a member of the large group of animals that have a backbone or spinal column, including mammals, birds, amphibians, reptiles, and fishes. [1/3 definitions] |
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