Snail Rod

The snail rod (lat. modiolus) is a skeletal element characteristic of arthropods, mollusks and coelenterates. It is made of calcium carbonate, and as animals grow, it fills with minerals. The structure of the cochlea shell consists of layers containing moisture. The skin of a mollusk consists predominantly of keratin protein with a high sulfur content, saturated dry or acidic amino acid units, polysaccharides and glycoproteins, and mineral components (calcium and magnesium). Strong connective tissue fibers are part of the inner bone plate. The attachment apparatus consists of an interweaving of fibers of the mantle tissue (epithelium) with sclerotomal hooks, which are located between layers of long longitudinal fibers that lie along the skin and are not attached to it. All layers of the mantle