A structural model for packet store-and-forward routing protocols in Wireless Body Area Networks (WBANs) is presented in this paper. WBAN has been experimentally constructed in order to illustrate and capture on-body topology disconnections. The discontinuity of the topology outcomes of the presence of ultra-short transmission range radio links, unexpected Radio Frequency (RF) attenuation, and the mobility of the human posture. Energy harvesting model for ultra-short transmission range on-body sensor is proposed. Then, these sensors are used for demonstrating delay techniques for evaluating on-body single-copy Delay Tolerant Network (DTN) packet routing protocols.