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Bronchial Mucosa
A bronchus is a passage or airway in the lower respiratory tract that conducts Atmosphere of Earth, air into the lungs. The first or primary bronchi pronounced (BRAN-KAI) to branch from the trachea at the Carina of trachea, carina are the right main bronchus and the left main bronchus. These are the widest bronchi, and enter the right lung, and the left lung at each Root of the lung, hilum. The main bronchi branch into narrower secondary bronchi or lobar bronchi, and these branch into narrower tertiary bronchi or segmental bronchi. Further divisions of the segmental bronchi are known as 4th order, 5th order, and 6th order segmental bronchi, or grouped together as subsegmental bronchi. The bronchi, when too narrow to be supported by cartilage, are known as bronchioles. No gas exchange takes place in the bronchi. Structure The trachea (windpipe) divides at the carina of trachea, carina into two main or primary bronchi, the left bronchus and the right bronchus. The carina of the trach ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lower Respiratory Tract
The respiratory tract is the subdivision of the respiratory system involved with the process of Respiration (physiology), respiration in mammals. The respiratory tract is lined with respiratory epithelium as respiratory mucosa. Air is breathed in through the nose to the nasal cavity, where a layer of nasal mucosa acts as a filter and traps pollutants and other harmful substances found in the air. Next, air moves into the pharynx, a passage that contains the intersection between the esophagus, oesophagus and the larynx. The opening of the larynx has a special flap of cartilage, the epiglottis, that opens to allow air to pass through but closes to prevent food from moving into the airway. From the larynx, air moves into the trachea and down to the intersection known as the carina of trachea, carina that branches to form the right and left primary (main) bronchus, bronchi. Each of these bronchi branches into a Bronchus, secondary (lobar) bronchus that branches into Bronchus, terti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
