âĄď¸it's human eye,...looking pretty đ as well as fascinating â¨....in it a small sweet part of organ is present where there is no blood supply,,,i.e., CORNEA.....âď¸The tissues that make a cornea are able to maintain their transparency partially by not having blood vessels flowing through them....â & Due to lack of blood vessels, the cornea must get its oxygen directly from air...!!âď¸The oxygen first dissolves in the tears and then diffuses through out the cornea to keep it healthyđ..... Hope it's a bit Helpful!!!đ.....