The daily average low (blue) and high (red) temperature with percentile bands (inner band from 25th to 75th percentile, outer band from 10th to 90th percentile). The warm season lasts from July 21 to October 2 with an average daily high temperature above 88AÂ°88Ã¢. f
Epithelial cells help to protect or enclose organs. Most produce mucus or other secretions. Certain types of epithelial cells have tiny hairs called cilia, which help remove foreign substances. Epithelial cells are arranged in single, or multiple layers, depending on the organ and location.
7 7 Simple vs. Stratified Single LayerMulti-layered Epithelial tissue is called simple if it is one layer thick, stratified if it is multilayered. The apical surface is the free surface in both cases, i.e. the surface toward the lumen of an enclosed tubule or duct, or the surface of the body in the case of the skin. 6 Arrangement and Structureof Epithelial Cells â¢simple-single layer of cellsâ¢stratified-multilayered cellsâ¢pseudostratified-false stratifiedâ¢transitional-stretchableâ¢ciliated-cells possess cilia Arrangement and structural characteristics also distinguish different types of epithelial tissue.