Structure of Anatropous ovule : Each ovule develops inside the ovary and is attached to the placenta by a small stalk called funiculus. The place of attachment of funiculus with the main body of ovule, is called hilum. In angiosperms, the most common type of ovule is anatropous in which micropyle is directed downwards and is present adjacent to the funiculus (funicle). The ovule consists of central parenchymatous tissue, the nucellus which is surrounded usually by two protective coverings called integuments viz. Outer and an inner integument. A narrow opening at the apex of the ovule is called micropyle. Chalaza is the base of ovule directly opposite to micropyle. Embryo sac (female gametophyte) is oval, multicellular structure embedded in the nucellus