epitéliát
Epitélium is a fundamental type of animal tissue that covers the external surfaces of the body, lines internal cavities and passages, and forms glands. It is characterized by cells that are tightly packed together with very little extracellular space. This arrangement creates a continuous sheet that serves as a protective barrier, facilitating or inhibiting the passage of substances.
Epithelial tissues are classified based on two main criteria: the number of cell layers and the shape
Cell shapes are described as squamous (flat and thin), cuboidal (cube-shaped), or columnar (taller than they are
In addition to forming protective coverings and linings, epithelial cells can differentiate to perform specialized functions.