Simple cuboidal epithelium is composed of one layer of square cells. Do you now know that the word "simple" when used to describe epithelium means a single layer? You have already seen this slide during your study of cells. The cells are somewhat cube-shaped and are tightly joined together forming tiny tubes that make up the kidneys. Are you studying a cross section or a longitudinal section of the tubule?
What is the lumen?
Where is this type of tissue found in the body (in addition to the kidney)?
What is the function of this type of tissue?
Yes, the word "simple" when used to describe epithelium means a single layer of cells.
Based on the description given, it seems like a cross section of the tubule is being studied.
The lumen refers to the central, open space within a tubular structure. In the case of the tubules in the kidney, the lumen would be the hollow space within the tiny tubes.
In addition to the kidney, simple cuboidal epithelium can be found in various other organs and tissues in the body. Some examples include the lining of the ducts in glands (such as salivary glands and pancreatic ducts), the surface of the ovaries, and the lining of respiratory bronchioles.
The function of simple cuboidal epithelium varies depending on its location. In the kidneys, it is involved in reabsorption and secretion processes, aiding in the filtration of waste products and maintenance of fluid and electrolyte balance. In other organs, it may have different functions such as secretion, absorption, or protection.