epithelial
/,epi'θ:ljəl/
Học thuậtThân thiện
Definition
- Adjective:
- Of or belonging to the epithelium: Pertaining to or consisting of the thin layer of cells that forms the covering or lining of most internal and external surfaces of the body and its organs.
Usage
- The word epithelial is used exclusively as an adjective in biological and medical contexts to describe tissues, cells, layers, or structures that constitute or relate to the epithelium.
- It is typically placed before a noun (e.g., epithelial cell, epithelial tissue) or used in predicate position (e.g., The layer is epithelial).
Examples
- Adjective:
- The biopsy confirmed the presence of abnormal epithelial cells.
- The skin's outermost layer is an epithelial barrier against pathogens.
- Damage to the epithelial lining of the intestine can cause health issues.
Advanced Usage
- "Epithelial-to-mesenchymal transition (EMT)": A complex biological process in which epithelial cells lose their characteristics and gain properties of mesenchymal cells, crucial in development and cancer metastasis.
- Researchers are studying the role of epithelial-to-mesenchymal transition in tumor progression.
Variants and Related Words
- Epithelium (n): The actual tissue composed of epithelial cells.
- The cornea is covered by a protective epithelium.
- Epithelioid (adj): Resembling epithelium in appearance or structure.
- The granuloma contained epithelioid macrophages.
Synonyms
- Membranous: Having the nature of or resembling a membrane (a broader, less specific term).
- Tegumentary: Relating to a covering or integument (more general, often for skin).
Antonyms
- Connective: Relating to connective tissue (e.g., bone, cartilage), which supports and binds other tissues, as opposed to covering surfaces.
- Mesenchymal: Relating to mesenchymal tissue, which gives rise to connective tissues, in contrast to epithelial tissue.
Adjective
- of or belonging to the epithelium
- epithelial layer