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
An armillary sphere is a scientific model which demonstrates the workings of the celestial sphere, a concept which was historically used by astronomers and other scientists to understand the heavens. Viewing the Earth as the center of the universe, the celestial sphere consists of the objects visible from Earth.