A bone is a rigid organ that constitutes part of the vertebral skeleton. Bones support and protect the various organs of the body, produce red and white blood cells, store minerals and also enable mobility.  Bone tissue is a type of dense connective tissue. Bones come in a variety of shapes and sizes and have a complex internal and external structure. They are lightweight yet strong and hard, and serve multiple functions. Mineralized osseous tissue, or bone tissue, is of two types, cortical and cancellous, and gives a bone rigidity and a coral-like three-dimensional internal structure. Other types of tissue found in bones include marrow, endosteum, periosteum, nerves, blood vessels and cartilage.

Annaba , (, , formerly Bône or Bona, historically Hippo or Hippo Regius) is a city in the northeastern corner of Algeria near the Seybouse River. It is located in Annaba Province. With a population of 257,359 (2008), it is the fourth largest city in Algeria. It is a leading industrial centre in eastern Algeria. Most of the people call this city بلد ألعنب Balad al-Unnâb, i.e. the city of jujubes, because of the abundance of this fruit in the area.