The mucosa of the cervical canal (endocervix) is composed of a single layer of mucin-secreting columnar epithelium, which covers the surface and the underlying glandular crypts. Isolated neuroendocrine epithelial cells of argentaffin type or argyrophil type are admixed with the normal endocervical cells.
Eutrophication can also occur as a result of natural events, such as climate change and geology. However, natural eutrophication is dramatically increased by human activity. The main difference between anthropogenic eutrophication and natural eutrophication is that the natural process is slow. Learn more about Botany
Eutrophication happens as water bodies, such as estuaries, slow-moving streams and lakes, receive excess nutrients that trigger excessive plant growth. This increased plant growth, often referred to as an algal bloom, reduces the amount of oxygen dissolved in the water when dead plants decompose and cause other organisms to die.