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.
Fennel, or Foeniculum vulgare, is a perennial plant indigenous to the Mediterranean region, but now widespread in many parts of the world. Fennel is a highly aromatic and flavorful herb commonly used in cooking, but it also has medicinal properties.nethole also provides the flavor and aroma of fennel seeds, which is often described as licorice-or anise-like. In fact, fennel seeds are sometimes mistaken for anise seeds and star anise, which have similar but stronger flavors.