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The internal structure of Earth. In geology, the crust is the outermost solid shell of a planet, dwarf planet, or natural satellite.It is usually distinguished from the underlying mantle by its chemical makeup; however, in the case of icy satellites, it may be defined based on its phase (solid crust vs. liquid mantle).
The anterior arch forms about one-fifth of the ring: its anterior surface is convex, and presents at its center the anterior tubercle for the attachment of the longus colli muscles and the anterior longitudinal ligament; posteriorly it is concave, and marked by a smooth, oval or circular facet (fovea dentis), for articulation with the odontoid process (dens) of the axis.
[1] [2] Geography is an all-encompassing discipline that seeks an understanding of Earth and its human and natural complexities—not merely where objects are, but also how they have changed and come to be. While geography is specific to Earth, many concepts can be applied more broadly to other celestial bodies in the field of planetary science ...
The complete 21st U.S. edition of Gray's Anatomy of the Human Body, published in 1924. at the Internet Archive N.B.: This is the most recent American version that is in the public domain. Online version of Gray's Anatomy – The complete 20th U.S. edition of Gray's Anatomy of the Human Body, published in 1918.
In reference to the muscles of the thoracic wall, the intercostal nerves and vessels run posterior to the internal intercostal muscles: therefore, they are generally covered on the inside by the parietal pleura, except when they are covered by the innermost intercostal muscles, innermost intercostal membrane, subcostal muscles or the transversus thoracis muscle.
[9] [10] [11] Pedology is the study of soils in their natural environment. It deals with pedogenesis , soil morphology , soil classification . Soil geography studies the spatial distribution of soils as it relates to topography , climate (water, air, temperature), soil life (micro-organisms, plants, animals) and mineral materials within soils ...
The edition published in Strasbourg in 1513 was a major step in the modernization of the Geography. It preserved the corpus of Ptolemy's text and maps as faithfully as possible to the original while it provided a separate set of 20 more accurate and up-to-date modern maps. [ 53 ]
The Earth's mantle is a layer of silicate rock between the crust and the outer core.Its mass of 4.01 × 10 24 kg is 67% the mass of the Earth. [1] It has a thickness of 2,900 kilometres (1,800 mi) [1] making up about 84% of Earth's volume.