Topics: Structures and Functions of Living Organisms and Genetics Quiz
Which best explains how the nervous system controls the skeletal system?
A. The brain protects the skull.
B. The brain stores calcium for bones.
C. The brain produces red blood cells for bones.
D. The brain sends messages to the muscles to move bones.
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Which best describes how the digestive system compares to the respiratory system?
A. The digestive system removes waste, while the respiratory system breaks down food.
B. The digestive system provides food to cells, while the respiratory system provides oxygen for cells.
C. The digestive system provides oxygen for cells, while the respiratory system provides food to cells.
D. The digestive system moves food through the bloodstream, while the respiratory system removes waste.