The reproduction process The reproduction process is a process that aims to secure the existence and continuity of living organisms species and to prevent them from the extinction, The human reproduce sexually when two...
The muscular system The muscular system is the engine that moves our body, where the muscles generate the mechanical energy and the movement to the body due to the ability of the muscular cells...
The joint The joint is the location at which the bones meet each other, and they allow the movement between the bones, It is the point where two bones meet, The joints hold the...
The skeletal system The skeletal system consists of 206 named bones that make up the skeleton, It is divided into main divisions which are the axial skeleton and the appendicular skeleton, It gives the...
