The scutellum is a small shield-shaped structure located at the base of the embryo. It contains the embryo's food reserves and helps to absorb nutrients from the endosperm.

The pericarp is the outermost layer of the grain and it protects the grain from damage. It is composed of several layers of cells, including the epidermis, the hypodermis, and the mesocarp.

The embryo is the part of the grain that is responsible for producing new plants. It consists of the radicle, the plumule, and the scutellum.

The coleoptile is a sheath that protects the plumule as it emerges from the soil. It is composed of several layers of cells, including the epidermis, the hypodermis, and the mesocotyl.

The endosperm is the largest part of the grain and it is responsible for storing food reserves. It is composed of several layers of cells, including the aleurone layer, the starchy endosperm, and the horny endosperm.

The aleurone layer is a thin layer of cells that surrounds the endosperm. It produces hormones that regulate the growth and development of the grain.

The scutellum is a small shield-shaped structure located at the base of the embryo. It absorbs water and nutrients from the endosperm and transports them to the embryo.

The starchy endosperm is the largest part of the endosperm and it stores food reserves. It is composed of several layers of cells, including the aleurone layer, the starchy endosperm, and the horny endosperm.

The endosperm is responsible for producing proteins. It contains several layers of cells, including the aleurone layer, the starchy endosperm, and the horny endosperm.

The horny endosperm is a thin layer of cells that surrounds the starchy endosperm. It protects the endosperm from damage.

The endosperm is responsible for producing lipids. It contains several layers of cells, including the aleurone layer, the starchy endosperm, and the horny endosperm.

The germ is the part of the grain that produces new plants. It consists of the embryo, the scutellum, and the coleoptile.

The endosperm is responsible for producing carbohydrates. It contains several layers of cells, including the aleurone layer, the starchy endosperm, and the horny endosperm.

The bran is the outermost layer of the grain and it protects the grain from damage. It is composed of several layers of cells, including the epidermis, the hypodermis, and the mesocarp.

The endosperm is responsible for producing vitamins. It contains several layers of cells, including the aleurone layer, the starchy endosperm, and the horny endosperm.