The Endocrine System chart describes the components and functions of the system that regulates bodily processes. The main image depicts the overall transport system (the vascular system) and associated organs. The action of hormones is shown as a feedback loop and through the concept of target cells. Heavy gauge 3ml lamination with sealed edges and two metal eyelets for hanging makes chart highly durable. Write-on/wipe-off with dry erase marker (not included).