Definition, Meaning & Synonyms
apical surface
noun
ˈeɪ.pɪ.kəl ˈsɜːr.fɪs
Definition
The apical surface refers to the uppermost layer of cells in a tissue, typically facing a free space or lumen, such as in epithelium.
Examples
- The apical surface of intestinal epithelial cells plays a crucial role in nutrient absorption.
- In the kidneys, the apical surface of the tubular cells is involved in the reabsorption of water and electrolytes.
- During the development of embryos, the apical surface is important for cell signaling and communication.
Meaning
In biological terms, the apical surface is the surface of epithelial cells that is exposed to the external environment or an internal body cavity.
Synonyms
- superficial surface
- upper surface
- external layer
