Anatomy :lungs (microscopic structure,bronchial tree and clinicals)
Now some clinical aspects.clinical aspects include the different types of pathology occurring inside the lungs.So what are they pneumonia ,lung cancer, Bronchitis,Bronchoectesis etc. Etc.And of course in context of our country Tuberculosis. Pulmonary Tuberculosis is very much prevalent disease in our country.So you may go through only the names of theses diseases. Now the bronchial tree at first this is the left lung we all know so at first a principal bronchus enters the left lung ,then it divides into two branches one for each lobe .the upper lober bronchus and the left lower lober bronchus ,the lober bronchus are also called the secondary bronchus the for each broncho pulmonary segment there is one bronchus which is called tertiary bronchus.so primary bronchus : that is the principal bronchus ,lober bronchus or secondary bronchus segmental bronchus or tertiary bronchus then we have terminal bronchus lobular bronchiole terminal bronchiole then we have respiratory bronchiole alveolar duct atrium alveolar sac alveoli you can find these references in any recognized book of anatomy so I suggest you you may go through them and match my information with them while watching the video now i am going to discuss the micro structure of the lung so as we know the lung is covered by a serus covering which is called pleura which has two parts one is parietal and one is visceral .visceral pleura is indicated intricately related to the surface of the lung and it goes inside the fissures of the lung while the parietal pleura goes over the fissures of the lung .so as you can see the glazing part of the lung represents the visceral pleura here this is the visceral pleura. This is the visceral pleura ,now after the serus coat we have some sub serus alveolar coat which is not visible here sub serus alveolar coat is made up of connective tissue and then we have the pulmonary matter that is lung the alveolus and bronchial tree and etc etc.Now if we go analysing different cell types found in lung , there are at first ciliated columner epithlial cells ten serus cells goblet cells brush cells intermediate clara and argentafin cells so they have different functions which are not very important for your exam but if you want to read about them you may read about them but the principal cell types found in the alveolus are 3 types : Type 1 pneumocyte which are simple squamous epithelial cells ,type 2 pneumocytes which are there to secrate a substance which is called surfactant. The surfactant reduces the surface tension of the lung and there is alveolar macrophage ,so inside the alveolus there is three types of cells type 1 pneumocyte ,type 2 pneumocyte and alveolar macrophage .
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