Describe a situation where a cosmetologist might need to know basic information about one of the major systems (skeletal, muscular, endocrine, circulatory, etc.).

A cosmetologist might need to know basic information about one of the major systems when performing services that can affect or interact with these systems. For example, when a cosmetologist is providing a massage service, knowledge of the muscular system is essential. They will need to understand which muscles are located in different areas of the body, how they function, and the best techniques for massaging each muscle group to promote relaxation and avoid causing any harm.

Another situation could be when a cosmetologist is performing a facial treatment. Knowing the basics of the circulatory system could help them understand how increasing blood flow to the face can enhance skin health and the healing processes. This knowledge allows them to choose the most effective methods for stimulating circulation, such as through massage techniques or the application of certain products that encourage vasodilation, which is the widening of blood vessels.