Which phrase best describes the main function of the heart a. cleans the blood of wastes b. breaks down food c. pumps blood throughout the body d. recognizes and destroys foreign invaders

Select the correct answer. which statement applies only to the axial skeleton, not the appendicular skeleton? a. it contains a pivot joint. b. it has muscles attached that work in pairs. c. it contains red bone marrow. d. it possesses fossa for bone articulation. e. it protects the heart and lungs.