Definition of guano. : a fertilizer containing the accumulated excrement of seabirds or bats; broadly : excrement especially of seabirds or bats.
This is a cross section through the small intestine. The tall, vertical cells seen at the top of the tissue are columnar cells (one is shown - red arrow), which make up simple columnar epithelium (the cells at the bottom of the image are connective tissue, which will be discussed later). Since columnar cells are quite thick, they do not readily allow passive diffusion.
Both stratified squamous and stratified columnar contain cube shaped cells on the basal surface, but apical shape matches the name of the tissue. 7. Name the specific type of epithelial described by the following: a tissue that consists of multiple layers of cells, in which the top layer is composed of columnar cells.