Anatomy and Cell Biology 3319 Lecture Notes - Lecture 38: Abdominal Aorta, Shortness Of Breath, Respiratory Tract Infection
Document Summary
Bordered by the diaphragm the base of the lung is resting on the diaphragm. Apex of the lung is just posterior to the first rib. Cardiac notch: in the left lung and as a result the left lung is slightly smaller. 16-20 c shaped hyaline cartilage rings so it does not deflate when there is no air: c shaped since esophagus is behind and need space for it to expand when swallowing. Trachealis muscle will contract and accelerate air out. Carina: last bit of hyaline cartilage, split into the bronchi. Inside of the carina: trachealis, hyaline cartilage on the outside of the trachea, mucous help trap bacteria, particles, etc. , cilia beat to help propel up and out (mucociliary escalator) In a hospital setting: slight incision between tracheal rings, insert a tube so that the external air can bypass and keep someone breathing. Hilum: indentation of the lungs where everything enters: primary bronchi enters the most posterior, pulmonary artery and veins.