The main function of the circulatory system is to O transport gases into and out of the body.
O transport nutrients, gases, and wastes.
O diffuse gases from the blood to lungs.
O filter water and wastes.

Which statement correctly describes other ways in which nebulae and stars are different? a. a star always has a higher density than a nebula. b. stars can form inside a nebula but a nebula can never be produced by any star. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star. reset submit