Insulin. Insulin is a hormone made by the beta cells in the pancreas. It is the key that opens the doors of cells and allows glucose to get into the cell. Each cell needs glucose to function. Carbohydrates in food are broken down into glucose which enters the blood stream.
The pericycle is a cylinder of parenchyma or sclerenchyma cells that lies just inside the endodermis and is the outer most part of the stele of plants.
Flowers form the reproductive parts of flowering plants. Most flowers have four main parts - calyx, corolla, stamens, and pistils. The flower parts are attached to a place on the stem called the receptacle. The calyx consists of small, usually green leaf like structures called sepals. All the petals of a flower make up the corolla.