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 student individually talk about their heart to the whole class. Further assessment comes from students drawing their hearts from their models, labeling the drawn hearts with their own terminology, and providing a written description on how their heart works mechanically. 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.