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Each vertebra (pl.: vertebrae) is an irregular bone with a complex structure composed of bone and some hyaline cartilage, that make up the vertebral column or spine, of vertebrates. The proportions of the vertebrae differ according to their spinal segment and the particular species.
This glossary of geography terms is a list of definitions of terms and concepts used in geography and related fields, including Earth science, oceanography, cartography, and human geography, as well as those describing spatial dimension, topographical features, natural resources, and the collection, analysis, and visualization of geographic ...
The vertebral column is composed of many ring-like bones called vertebra (plural: vertebrae) and it spans from the skull to the sacrum. Each vertebra has a hole in the center called the vertebral foramen through which the spinal cord traverses. [3] Laminae (singular: lamina) are the anatomical structures of primary importance in a laminotomy.
If vertebrae of the neck are involved it is labelled cervical spondylosis. Lower back spondylosis is labeled lumbar spondylosis. The term is from Ancient Greek σπόνδυλος spóndylos, "a vertebra", in plural "vertebrae – the backbone". "osis' is Latin/English for "a process or condition".
The number of vertebrae in a region can vary but overall the number remains the same. In a human spinal column, there are normally 33 vertebrae. [3] The upper 24 pre-sacral vertebrae are articulating and separated from each other by intervertebral discs, and the lower nine are fused in adults, five in the sacrum and four in the coccyx, or tailbone.
From the plural form: This is a redirect from a plural noun to its singular form. This redirect link is used for convenience; it is often preferable to add the plural directly after the link (for example, [[link]]s ).
The placement of hagfishes on the vertebrate tree of life has been controversial. Their lack of proper vertebrae (among other characteristics of jawless lampreys and jawed vertebrates) led phylogenetic analyses based on morphology to place them outside Vertebrata. [48] Molecular data, however, indicates they are vertebrates closely related to ...
A vertebra is a bone in the spinal column of a vertebrate animal. Vertebra may also refer to: Vertebra (software), an environment for developing distributed software applications; Vertebrae (album), the album by Norwegian metal band Enslaved