Which two body systems provide humans with
the raw materials necessary for their
cells to
release energy?
(1) muscular and skeletal
(2) endocrine and nervous
(3) digestive and respiratory
(4) reproductive and circulatory
the raw materials necessary for their
cells to
release energy?
(1) muscular and skeletal
(2) endocrine and nervous
(3) digestive and respiratory
(4) reproductive and circulatory