Early civilizations used plants as medicine.
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!
I would have to say either B or C.. I am leaning more towards C though.. hope this helps a little
Helps prevent blood clots
Answer:
You could check the Google for that
