________ the groove that separates the two rounded buttocks, running from the base of the spine (sacrum) to the perineum (tissue between the anus and either the vaginal opening or the scrotum)

Which sectors are included in the dental care delivery system in the United States?

A) Private sector B) Federal government C) State government D) All of the above E) None of the above

The reptile heart is different to the heart of a mammal in that:

A) it has two ventricles and one atrium. B) it has two atria and one ventricle. C) only the left ventricle functions. D) only the right atrium functions.