Skeletal system
Make sure you understand how our bones are able to protect our organs, also understand the differences between compact and spongy bone and where they are found within the different bone types (long vs flat).
Understand how our skeletal system maintains homeostasis of different minerals (calcium, phosphorous, carbonate) and make sure you understand the different hormones involved.
Explain why a person may have hypercalcemia or hypocalcemia, a disease that may occur due to these conditions, and provide a treatment for these conditions(think about the hormones involved in blood calcium regulation).