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
Index. Armillary spheres can be divided into two main categories: the observational armillary, as used by Ptolemy and Tycho Brahe; and the demonstrational instrument.Both types consist of a number of rings (Latin: armillae) which are arranged so as to model the circles of the celestial sphere.ndex. Armillary spheres can be divided into two main categories: the observational armillary, as used by Ptolemy and Tycho Brahe; and the demonstrational instrument.