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 miniature representation of celestial objects in the sky, depicted as a series of rings centered around a globe.rmillary spheres first appeared in China during the Han Dynasty (206 B.C.-220 A.D.). One early Chinese armillary sphere can be traced to Zhang Heng, an astronomer in the Eastern Han Dynasty (25 A.D.-220 A.D.). The exact origin of armillary spheres cannot be confirmed.