biol+1+mammalian+respiration+lesson

Ok fellow biologists, you have a small task to complete here. In the first diagram below I failed to mention and label a part of the respiratory system. You need to make sure that you amend the diagram in your own set of notes. To give you a clue: if a piece of food blocks this structure and a patient is at risk of dying due to lack of oxygen, a tracheotomy is carried out which involves "stabbing" the patient in this region with a sharp object so that air can enter the airways. If you think you have the answer, write it on the line below and desribe its position in relation to other structures of the respiratory system.