سؤال قراءة ستيب محلول — فهم التفاصيل (تدريب 8157)

Vitamins are organic compounds that the body needs in small amounts to function properly. Humans need 13 different vitamins, which have many roles in the body. For example, Vitamin A helps maintain good vision. Vitamin B helps form red blood cells. Vitamin K is needed for blood to clot when you have a cut or other wound.