Polycystic Ovarian Disease: This disease, also commonly known as PCOS, refers to cysts that form from a buildup of follicles. They cause the ovaries to enlarge and create a thick outer covering, which may prevent ovulation from occurring. They are often the cause of fertility problems.
dune. n. A hill or ridge of wind-blown sand. [French, from Old French, from Middle Dutch. ; see dheuÉ- in Indo-European roots .].
Sand dunes are common features of shoreline and desert environments. Dunes provide habitat for highly specialized plants and animals, including rare and endangered species. They can protect beaches from erosion and recruit sand to eroded beaches.Dunes are threatened by human activity, both intentional and unintentional.and dunes are common features of shoreline and desert environments. Dunes provide habitat for highly specialized plants and animals, including rare and endangered species. They can protect beaches from erosion and recruit sand to eroded beaches. Dunes are threatened by human activity, both intentional and unintentional.