What type of cellular structure is primarily involved in secretion and absorption in glands?

The type of cellular structure that is primarily involved in secretion and absorption in glands is simple cuboidal epithelium. This epithelium is composed of a single layer of cube-shaped cells, which provides an ideal surface area for both secretion and absorption processes.

Simple cuboidal epithelium is commonly found in various glands, such as the salivary glands, pancreas, and thyroid gland, where it plays a vital role in producing and secreting substances like hormones, enzymes, and other fluids. Additionally, this type of epithelium lines the tubules of the kidneys, where it is crucial for the reabsorption of water, electrolytes, and nutrients.

In contrast, other types of epithelium, such as simple squamous, stratified, and ciliated, have different structures and functions. Simple squamous epithelium is better suited for diffusion and filtration, as its thinness allows for easy passage of materials. Stratified epithelium serves mainly as a protective barrier and is found in areas subject to friction and wear, such as the skin. Ciliated epithelium is specialized for the movement of mucus and particles, commonly found in the respiratory tract.

Thus, simple cuboidal ep