In which way does the circulatory system rely on the skeletal system?
A. Glucose is secreted by compact bone as an energy source for blood.
B. Spongy bone stores minerals needed by blood cells.
C. Bones provide a source of oxygen to blood.
D. Blood cells are produced in bone marrow.
I don't know? Please help?
It's D:)posted by SkatingDJ
Yes, D.posted by DrBob222
I don't know either SkatingDJposted by Desiree
lolposted by Hacker