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.
1 Circumvallate papillae-there are only about 10 to 14 of these papillae on most people, and they are present at the back of the oral part of the tongue. 2  They are arranged in a circular-shaped row just in front of the sulcus terminalis of the tongue. Circumvallate papillae-there are only about 10 to 14 of these papillae on most people, and they are present at the back of the oral part of the tongue. 2  They are arranged in a circular-shaped row just in front of the sulcus terminalis of the tongue.