Students must understand they have basic freedoms in their heart's design, but they do have to produce an artificial heart which would work mechanically. As a teacher I want to examine each alien heart. During the examination I have the student tell me how blood would flow through their heart. A variation to this method of assessment would be to have the students individually talk about their heart to the whole class. The Plant Earth has discovered many new planets which contain life.
Some life forms are almost human-like aside from a few features.
Your star-ship has just landed on an undiscovered planet. To repair your star-ship, you need to find the mineral reggeti. You decide you will lead your crew in a search for the substance. In a short time you meet a human-like alien colony calling themselves Xyphoids. Your crew is excited to meet this population because you hope they know how to located reggeti.