There are three distinct types of muscles: skeletal muscles, cardiac or heart muscles, and smooth (non-striated) muscles.
HVAC technicians are responsible for the installation, maintenance and repair of heating, ventilation and air conditioning (HVAC) systems. As an HVAC technician, your job duties may include inspecting existing systems and making recommendations intended to improve the efficiency and/or safety of that system's performance. HVAC-R techs may also work on refrigeration systems.
Job Skills and Responsibilities of a Professionally Licensed Esthetician: 1  Skin Care Procedures: 2  Perform a detailed skin evaluation, by use of magnifying lamps and specialized equipment to evaluate the skinâs condition and appearance. 3  Provide facial massages.