What is the structure of a wheat grain?

A caryopsis is a dry, single-seeded fruit of plants of the family of cereals, which includes wheat. In the caryopsis, the pericarp is firmly adhered to the seed coat and it is impossible to separate them. A wheat seed consists of an embryo and the surrounding endosperm. The endosperm stores nutrients. A wheat germ has a root, a stalk, a bud with leaves and one cotyledon, which separates the embryo from the endosperm, and when the seed germinates, it passes dissolved nutrients into it.