Cartilage is a connective tissue consisting of a dense matrix of collagen fibres and elastic fibres embedded in a rubbery ground substance. The matrix is produced by cells called chondroblasts, which become embedded in the matrix as chondrocytes.
The Brass Armillary Sundial is a beautiful accent in a courtyard or garden, and also functions as a timepiece. Artisan crafted of solid brass with accents and raised Roman numerals, the sundial has a two-tone verdigris and polished brass finish the will further develop its beautiful patina over time. Heirloom quality garden art with hand buffed and polished finish
The armillary sphere survives as useful for teaching, and may be described as a skeleton celestial globe, the series of rings representing the great circles of the heavens, and revolving on an axis within a horizon.With the earth as center such a sphere is known as Ptolemaic; with the sun as center, as Copernican.he sphere, built in 1433 was named Honcheonui (í¼ì²ì). The Honcheonsigye, an armillary sphere activated by a working clock mechanism was built by the Korean astronomer Song Iyeong in 1669. It is highly valued in term of clock-making technology and is the only remaining astronomical clock from the Joseon Dynasty.