When Theias shot an arrow into the tree â or when a boar used its tusks to rend the tree's bark â Adonis was born from the tree. This myth fits both Adonis' nature as a vegetation god and his origins from the hot foreign desert lands where the myrrh tree grew.
intrinsic. adj. 1. of or relating to the essential nature of a thing; inherent. 2. (Anatomy) anatomy situated within or peculiar to a part: intrinsic muscles. [C15: from Late Latin intrinsecus from Latin, inwardly, from intrÄ within + secus alongside; related to sequÄ« to follow].
Intrinsic factor is a protein that is produced by the parietal cells of the stomach. It binds to vitamin B12, thereby allowing absorption of the vitamin by intestinal cells. In pernicious anemia, an autoimmune disorder, autoantibodies are formed against intrinsic factor leading to its deficiency. The lack of intrinsic factor then causes malabsorption of vitamin B12 and subsequent anemia.