the answer is a. skin color
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Women should have 18 mg of iron a day unless pregnant or breast feeding.
Hope I helped
The integumentary system is composed of skin and other appendices such as nails and hairs. In the integumentary system there are several connections with the endocrine system.
As the heart pumps, it sends oxygenated blood to the rest of the body.
So the pumping action of the heart is what carries blood away from the Heart.
