Answer:
The integumentary system.
Explanation: The integumentary system is the on that is responsible for regulation and synthesis of the vitamin D. Remember this, Vitamin D for the skin is found when the sunlight has absorbed on the skin. Hope this helps!
Vitamin E has many biological functions, including its role as a fat-soluble antioxidant.
Answer:
Use and Implications. So, now we know that at an annual growth rate of 4%, a population will double in 17.5 years.
