What term describes a tissue that consists of only one layer of cells?

The term that describes a tissue consisting of only one layer of cells is "simple." In histology, tissues can be categorized based on the number of cell layers they contain. Simple tissues are made up of a single layer of cells, making them distinct in their structure and function compared to other tissues with multiple layers, such as stratified tissues, which have two or more layers and are designed for protection.

This differentiation is crucial in understanding how various tissues function within the body. Simple epithelium, for example, is commonly found in areas where absorption, secretion, and filtration occur, as a single cell layer allows for efficient exchange between the tissue and its environment.

Stratified refers to multiple layers of cells, complex would imply a more intricate arrangement potentially involving various cell types and layers, while cuboidal describes the shape of the cells rather than the number of layers. Hence, "simple" is the appropriate term for a tissue with only one layer of cells.