When someone becomes excited, their pupils can dilate to up to four times their original size. Conversely, an angry, negative mood causes the pupils to contract to what are commonly known as 'beady little eyes' or 'snake eyes'. Lighter eyes can look more attractive because it's easier to see the dilation taking place.
The term papilla (plural: papillae) generally means a nipple-like structure, and may refer to: Mammary papilla, or nipple. Amphibian papilla and basal papilla, part of the inner ear of the frog. Interdental papilla, part of the gingiva between teeth.
Filiform papillae are the most numerous of the lingual papillae. Unlike the other kinds of papillae, filiform papillae do not contain taste buds. They cover most of the front two thirds of the tongue's surface.They appear as very small, conical or cylindrical surface projections, and are arranged in rows which lie parallel to the sulcus terminalis.nlike the other kinds of papillae, filiform papillae do not contain taste buds. They cover most of the front two thirds of the tongue's surface. They appear as very small, conical or cylindrical surface projections, and are arranged in rows which lie parallel to the sulcus terminalis.