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Hi, everyone. Uh, thank you very much for joining us tonight. And, uh, one of our continuing actors of the series have been doing throughout the year. Uh, we started with kind of our thoracic aspect or respiratory aspect of medicine and surgery. Um, with thoracic anatomy one and this week Thoracic Anatomy two is going to be held once again by Mister Campbell, who's our treasure and thankfully, he's taking the time to create some wonderful slides um, to show us, uh, the good news about thoracic anatomy. So, over to Mister Campbell Taser. Ok. Can you hear me? See me now? Hopefully, I think that is it sort of, uh, apologies, but I still haven't learned in 4.5 years how to use a computer. Uh, let me share my slides again. Sure. Ok. Give me a heads up of that. Uh, sharing. Ok. And then if I'm able to go through the slides, yeah, grand. I think that's it working. Ok. Uh Sorry for delay, folks. Er, it was nice again to James for the introduction, I'm Donovan. And so two weeks ago we went through the Thoracic wall, the osteology and muscles. And so we're working our way in. So this time we'll be going through more. So what's on the inside thorax? So we'll go through the compartments of the mediastinum, walk through the trigger bronchial tree. Have a look at the lungs through it. I go through the main, your vascu so we done the neurovascular bundle last time. So we'll go through some other arteries, veins and nerves as well as the very important lymphatics, especially in the setting of lungs and how you uh problems arising in the lungs as well as uh going through esophagus, diaphragm, all the bits and pieces again, anytime far away into the chat, any questions, queries, I can't see you now, but I'll see you at the end. Um And there's just a couple of questions here as well. So the media style compartment. So they're divided up differently. Uh historically, traditionally, it's this four part model which is more anatomical. More recently, there's been a move towards uh splitting them up using CT imaging. I'll show you that a couple of slides, but for all intents and purposes, the four part model is the best one probably to learn from the mediastinum is divided first in the two parts, your superior and your inferior by this line. Again, I don't know if you can say, but it's like the T four level and it's that transverse plane of Ludwig from last time and then the inferior mediastinum split further anterior, anterior middle and posterior, see if I can on laser pointer and the metal media sign has been covered uh during our cardiac anatomy teaching. So we'll be looking more at the other three compartments. So starting with a superior need to sign and we'll start with the borders of what makes up that superior mediastinum. So right up at the top, basically at the base of her neck is the thoracic inlet. Sometimes you see it called thoracic aperture and inferior hits again that level at T four, that transverse plane of Ludwig at the front is a num the top part of the sternum. And posteriorly, you've got your vertebral bodies. T one all the way down to T four and on either side is your pleur and that will be the easy one to remember for all of your lateral boundaries. Now, there's a lot that goes on here. So you've got different structures that are transversing down from the neck as well as others rising up from deep within the thorax. So private left battles a little mnemonic to help remember what's inside your spe meum. You have your ranic and vagus nerve as well as your thoracic duct. You have then your left recurrent laryngeal nerve, it laps under the arch of the aorta before going up to your tracheoesophageal groove. You have your brachycephalic vein, your aortic arch, thymus, trachea, very important lymph nodes as we'll find out later and your esophagus works a little bit better. For the American sp this pneumonic then straight into the first question, give us on our toes, what marks then the superior border of the superior mediastinum. And I'll give you a couple of minutes to go through this one.