The glands that secrete hormones comprise the endocrine signaling system. The term hormone is sometimes extended to include chemicals produced by cells that affect the same cell (autocrine or intracrine signalling) or nearby cells (paracrine signalling).
A fen is one of the main types of wetland, the others being grassy marshes, forested swamps, and peaty bogs. Along with bogs, fens are a kind of mire. Fens are usually fed by mineral-rich surface water or groundwater.
4. fennel-fennel seeds are ground and used as a spice or as an ingredient of a spice mixture. spice-any of a variety of pungent aromatic vegetable substances used for flavoring food.Translations.. a plant, Foeniculum vulgare, of the parsley family, having aromatic feathery leaves and umbels of small yellow flowers. 2. Also called fenâ²nel seed`. the aromatic aniselike fruit of this plant.