Jesus cannot be devided. He is entire in both the host and consecrated wine, having overcome death and transfigured, it is not possible to separate Him. If one recieves either from one species or both in holy communion one has recieved the entire Christ. As there is danger of spilling the Precious Blood when the chalice is passed or people receive from the chalice, it is not always offered at communion time. One is not, “Missing out” on anything if one does not receive from the chalice. For Protestants (many of) whom have denied the real presence from the 1500’s on, and see the bread and wine at their communion service as simply a symbol of His body and blood, and something separate from Christ it is an issue.