What are the functions of the parts of the heart?

leave a great explanation.
in advance

If a man does not use a condom will he get a std

If birth rates fall below the replacement level, then a country is in which stage of demographic transition? a. urbanization/industrialization b. mature industrial c. postindustrial d. pre-modern

17. susie jones is in the office today to see her regular physician for her 5 year well child check. she is getting ready to start school in a month and needs to have her immunizations updated. what modifier will be used with the preventative service code? explain why the modifier is required for reimbursed of both the well child check and the immunizations