goblet cell respiratory tract goblet cell 2010-09-23T04:42:27Z The respiratory goblet cell is a highly specialized cell type found primarily within the respiratory tract, including the nose, trachea, and lungs. Named because their shape resembles a goblet - a drinking vessel with a wide body and narrow neck - these cells form a vital part of the respiratory system's protective mechanisms. They are found within the columnar epithelium lining these organs, which forms a barrier between the internal body and the exterior environment. A principal function of the respiratory goblet cell is the production and secretion of mucus, a carbohydrate-rich, viscous and gel-like substance that plays a critical role in trapping dust, bacteria, viruses, and other airborne particles that are inhaled. The mucus secreted by the goblet cells covers the lining of the respiratory tract, effectively catching these particles and preventing them from reaching the lungs and causing infection. Mucus also provides hydration and lubrication to the respiratory tract surfaces, which is important in maintaining the tissue's health and functioning. In addition to their mucus-secreting capabilities, respiratory goblet cells also play a significant role in the body's inflammatory responses. When the respiratory system is exposed to irritants or pathogens, the number and activity of goblet cells often increase, leading to a higher production of mucus. This is a protective response designed to trap and neutralize the harmful substances more effectively. However, in conditions like chronic obstructive pulmonary disease (COPD) and asthma, an overproliferation of goblet cells, also known as goblet cell hyperplasia, can lead to excessive mucus production and airway obstruction. (This extended description was generated by ChatGPT and reviewed by the CellGuide team, who added references, and by the CL editors, who approved it for inclusion in CL. It may contain information that applies only to some subtypes and species, and so should not be considered definitional.) A simple columnar epithelial cell that secretes mucin. Rough endoplasmic reticulum, mitochondria, the nucleus, and other organelles are concentrated in the basal portion. The apical plasma membrane projects microvilli to increase surface area for secretion. respiratory mucosa goblet cells respiratory goblet cell respiratory tract secretory epithelial cell