Intra-body Communication (IBC) is an emerging and interesting communication technique in recent years. Utilizing the conductive property of human body, IBC employs human body as communication medium for transmitting electrical signals. As a result, electromagnetic interference can be greatly reduced for devices communicated within human body. These advantages are significant for home health care system, which abundant of interconnected cables are inevitable. In this paper, a preliminary quasi-static electromagnetic model for IBC based on the galvanic method is developed. This model attempts to provide insight of transmitting electrical signal through human body and forms a basis for developing IBC applications. Furthermore, this model is capable of providing the potential distribution in different type of biology tissues with different conductivities at low frequency. Finally, experimental measurements are conducted for validating the correctness of the model. ©2009 IEEE.