Epithelial cells Meaning and Definition
Epithelial cells
Pronunciation
/ˈɛpɪθiəl ˈsɛlz/
Part of Speech
Noun
Definition
Epithelial cells are a type of cell that forms the outermost layer of diverse tissues in the body, often providing a barrier or lining for bodily surfaces, glands, and organs.
Examples
- The epithelial cells lining the gut help absorb nutrients.
- Epithelial cells in the skin provide a barrier against external factors.
- During the development of the embryo, epithelial cells help shape the body.
- Epithelial cells in the kidney play a crucial role in the excretion of waste products.
- The lining of the respiratory tract is composed of epithelial cells that help filter the air we breathe.
Synonyms
- Cell type
- Tissue layer
Antonyms
- Muscle cells
- Connective tissue
Additional Information
Epithelial cells are classified into several types, including simple epithelial cells, stratified epithelial cells, and pseudostratified epithelial cells, each with unique structural and functional characteristics. They play a vital role in maintaining the integrity of the body and responding to external stimuli.
Epithelial cells are also involved in various physiological processes, such as absorption, secretion, and excretion, and are an essential part of the immune system.
Epithelial cells can be affected by various diseases, including cancer, and are a focus of research in understanding and treating diseases.
Etymology
The term “epithelial” comes from the Greek words “epi” meaning “upon” and “thele” meaning “womb” or “uterus”. This reflects the fact that epithelial cells were initially studied in the context of the lining of the uterus.
Usage Notes
Epithelial cells are generally used in scientific and medical contexts to refer to the outer layer of cells lining the body’s surfaces and organs. In everyday language, the term is not commonly used, but it is important for individuals to understand the role epithelial cells play in maintaining their overall health.
Cultural References
The term “epithelial cells” is not commonly featured in popular culture, but it has appeared in a few contexts, such as in scientific documentaries and educational programs.
Idiomatic Expressions or Phrases
None
Related Words or Phrases
- Cell
- Tissue
- Organ
- System
Collocations
- Epithelial cells and nutrient absorption
- Epithelial cells and immune function
- Epithelial cells and organ development
Frequency of Use
Epithelial cells are commonly used in scientific and medical contexts, but are not often featured in everyday language.
Common Misspellings
Gerbera