A mature osteocyte contains a single nucleus that is located toward the vascular side and has one or two nucleoli and a membrane. The cell also exhibits a reduced size endoplasmic reticulum, Golgi apparatus and mitochondria, and cell processes that radiate towards the mineralizing matrix.
The Paleolithic was the first era in human history. During it people lived as hunter-gatherers. It is when people learnt to make tools, to use fire, and to clothe themselves. The era produced some amazing artwork, the fabulous cave painting that have been found in Spain and in the Dordogne in southern France.
The Middle Stone Age was a period of African prehistory between Early Stone Age and Late Stone Age. It began around 300,000 years ago and ended around 50,000 years ago. It is considered as an equivalent of European Middle Paleolithic. It is associated with anatomically modern or almost modern Homo sapiens.tone Age artifacts include tools used by modern humans and by their predecessor species in the genus Homo, as well as the earlier partly contemporaneous genera Australopithecus and Paranthropus.