This EDITABLE card sort includes 11 body systems, their functions, organs, tissues and cells. Some of the trickier ones are labeled with hints, which can be easily cropped out for more advanced classes. You can laminate both the cards and student sheets for use in years to come. I use it as a review for an exam, but it can be used as an informal assessment at any point during the unit.
I have uploaded this in a PDF and .docx format so you can feel free to modify and differentiate to meet your classroom and students' needs. Enjoy!
NGSS HS-LS1-2. Develop and use a model to illustrate the hierarchical organization of interacting systems that provide specific functions within multicellular organisms.