The city shall, through such officer or officers as may be provided for by ordinance, enforce all laws and ordinances relating to health, and such officer or officers shall perform all the duties and may exercise all the powers relative to the public health provided by general law to be performed and exercised in municipalities by health officers. All regulations for the protection or promotion of the public health, additional to those established by general law and for the violation of which penalties are imposed, shall be made by ordinance and enforced as provided in this section.