 Let's remove this. Yeah, because he's developing mold everywhere. I don't know why, but... Can we spray some water there? This is the hot thing is there. Can you pass the bottle for them? I don't know why. So you're going to post this video? Yeah. You're safe, right? Yeah, I'm going to post the video actually. I'm going to post the video actually. I'm still working on this. Okay. The reason why I have candidates is because the mails are very thin while they collapse. That's why. I didn't want to keep running here and again and again so that's why. Just before we set... Can you see this thing here? This is the fibrous pericardium. Can you see how tough it is? This is the fibrous pericardium here. And we all know that the fibrous pericardium fuses with the tunic and gives you the great results. Remember? And the three great results, which are not from the top, we have the aorta, the pulmonary trunk, which is this one, and the superior vinaigrette. The superior vinaigrette is this one. This is the superior vinaigrette. So if I put my hand, the transverse sinus is here. I've not gone through. If you've gone from that side in front, my finger will be the aorta and the pulmonary trunk and behind my finger will be the superior vinaigrette. So the transverse sinus is here. I've not gone completely clear. So these three great results are partially inside the fibrous pericardium. That is what you're seeing here. You're seeing the fibrous pericardium here. So this is the fibrous pericardium. You can see it is merging with the tunic and vinscia. So now that you've seen that and it's resting on the diaphragm, on the diaphragmatic surface, my finger has gone on there. It's resting on the pericardium. Cardiophenic ligament. Okay. So you can see the aorta there. The sending aorta. This is the arch of the aorta. So can you see this whistle here? This is the brachioscephalic trunk. Brachioscephalic trunk on the right side. This is the brachioscephalic trunk. Can you see? Can you see this dividing in two? The right subclavian artery here. And can you see it is giving rise to the common carotid here? Did everybody see this? Come closer please. Can you see the structure here? This is the vagus. Remember the carotid sheath behind that runs the vagus? This is the vagus. So this is the common carotid here. At the upper border of the thyroid it is going to divide in two. Can you see the division there? It will divide in two. Internal and external carotid. There. At the upper border it is dividing in two. Internal and external carotid. There. Can you see? External and internal carotid. It's dividing there. If you want you can come even closer. Thank you very much. I'm doing it in real time for you so that you can see them and you can follow everything. Where is the scissor? I think I've tripped. That's a carotid sheath right? Yes. Now you started taking. So break your sepanic trunk. Divide it in two. Subclavian and common carotid. Common carotid at the level of the upper border of the thyroid. Dividing into external and internal. I'm going to put my force in between the scissor to show you that. There. Is anybody else wearing gloves? Pull up. Pull up. Yes, pull. There. I've put my instrument between the external and the internal carotid. So this is the internal carotid and the other one is the external carotid. So the common carotid is divided into external and internal carotid. Can you see here? Okay. There. Okay. This is the Subclavian. We will trace the Subclavian now. Okay. Now I'll show you the next point which I've been telling in the class. The Subclavian R3 runs in the Scalene Triangle. Remember? I will show you the Scalene Triangle. You're supposed to give me a standing ovation after this. Okay. So here. Can you see this muscle here? This is the first rib. This is the Scalene's anterior muscle. And behind, can you see another muscle here? Scalene's medius. Can you see the small triangular space in between the two? That is the Scalene Triangle. Can you see the Subclavian R3 is running behind the Scalene's anterior between the Scalene's anterior and the Scalene's medius? Yeah. What else runs in the Scalene Triangle? Radial flexors. Can you see the three? The trunks. The superior trunk. The middle trunk. And the inferior trunk. Yeah. Superior, middle and inferior trunk. The Subclavian R3 runs in front of the trunks. So the Subclavian R3 is running in front of the trunks. And the three trunks are running. Scalene's anterior, Scalene's medius. So this is the Subclavian Triangle here. And this is the first rib. So the Scalene Triangle is formed by the Scalene's anterior, Scalene's medius and the first rib. And you can see. So this is where you get Scalene's anterior syndrome. Are we clear? It can compress both the Subclavian R3 as well as the brachial flexors. So this portion of the Subclavian R3 which is called the first part. The portion of the brachial, the Subclavian R3 behind the Scalene's anterior is called the second part and the portion after that till the first rib is the third part and after part of the first rib becomes the axillary R3. Are we clear? This is the other end of the cut end. Can you see? If you bring them together this is the other cut end. Can you see my instrument is gone in? This is the other cut end. So if you bring it like this it remains. Axillary. So out of the part of the first rib the Subclavian becomes the axillary. Clear? For those of you who would like to see it on the other side we have done the same thing on the other side also. Let's start again from here. Let's continue again from the arch of aorta. On the left? Yeah. Now you have to pull like this and do a little bit of juggery there. Okay. So this is the arch of aorta. So we have done the brachiosepalic trunk. This is there. After the brachiosepalic trunk we have the the left common carotid. Can you see the left common carotid here? This is the left common carotid. My finger is gone under the left common carotid here. Clear? The left common carotid then continues for some reason in this what you look at I word they have ligated it. I don't like this one done by me please. Somebody else did it. I don't know why they did it. I think they did it to inject the embalming fluid you know so then I get it. So then this continues up and again if you were to dissect this up we will see the same thing as we saw on this side. So what you are seeing this is the carotid sheet. Can you see here? This is the carotid sheet. I am going to open the carotid sheet and you will see all the structures which I showed you earlier. There. There. And if you trace further up you will see this dividing into external and internal carotid which I have already shown you on this side. So let me just cut a little bit so that you can see a little more. Okay. So can you see? Here you can see the vagus much more clearly. Can you see the vagus running? So you are supposed to be asking the next question. You have shown me the common carotid on both the sides. Internal carotid. Good question. Let's start with the left side. It's collapsed here. This is the internal carotid. This is the, it's lateral. It's collapsed. It's very thin wall. Here. This is the internal carotid here. There. This is the internal carotid. It's highly, it's very, very thin wall. It's extremely thin wall here. And behind all of them will be the, can you see the vagus running here? The vagus runs behind the two red vessels. Internal carotid on this side. Now let's see the internal carotid. The internal carotid on this side has been partially cut and again they did some gimmicks. So this is the upper portion. I put the foreside here. If you notice there's a substantial size difference between the right side and the left side. In actual practice also, the internal carotid are the main venous vanishing of the skull from the brain. You will learn that next semester. All the cranial sinuses, they all ran into the internal carotid. From the signal sinus, they put the superior bulk and from the superior bulk, they drain out as the internal jugglers. On the right side, they are the main brain age from the superior satanic sinuses. So usually the right signal sinus and the right internal juggler vein is quite often larger than the left side. The left side continues as the straight sinus and then drains. So therefore, quite often the right side is larger than the left side. So that's what you're seeing here. Okay. So this portion, the remaining portion has been cut. This internal juggler here and the internal juggler here. Can you see it is uniting with something here? This is the the left brachiosephalic vein. Can you see the left brachiosephalic vein continues across and comes to the other side? So this is the right brachiosephalic vein and this is the left brachiosephalic vein. And they are uniting to form the the superior venic vein here. This is the superior venic vein. So this internal juggler and let's see the subclavian vein. This is the subclavian artery on this side. Okay. And I'm going to show you just now. We have seen the common kerotic. Can you see the next artery arising from here? This artery. Here. Can you see? This is the left subclavian artery. And this left subclavian artery again will run under the scariness anterior and becomes the left subclavian artery here. Can you see the roots trans of the brachial plexus here also? The superior trunk. The middle trunk. And the inferior trunk. And the subclavian artery running in front of them. Subclavian vein. Because this side has been cut. This is the other end of the subclavian artery. Just like this side. When I bring it together, they will come together. The subclavian vein, remember, runs in front of the scariness anterior. This is the cut end of the subclavian vein here. Here. So, left internal jugular, left subclavian vein you are writing about the left brachial plexus. Let me show you the subclavian vein on this side. Again, portion has been cut here. This is the cut portion. Because it's very thin board here. Instrument has gone in. So, this is the right subclavian. Right internal jugular. This was the subclavian. It was like this. Can you see it is running in front of the scariness anterior? Subclavian artery runs behind the scariness anterior, subclavian vein runs in front of the scariness anterior. Similar to subclavian vein runs in front of the scariness anterior, subclavian artery runs behind the scariness anterior. Subclavian vein, internal jugular vein, uniting at the level of the sternocleamic joint from the brachioscephalic. Internal jugular vein, subclavian vein here, which I have closed. This is the subclavian vein. Internal jugular vein Uniting to form the left brachiocephalic. This union takes place at the level of sternocleavicular joint. This union takes place at the level of the first rib. From the first to the third rib is the extent of the superior vinaigrette and then it enters into the right atrium. Are we clear? Yes. Okay. Now, so we have shown you all the great vessels running from here to the neck and coming from the neck to the heart. This is the full thyroid gland. This is the full thyroid gland. Yeah. This is the actual size. Okay. Oh, you thought it was bigger. So, can you see this narrowing portion is the espous? This is the cricoid. Remember, this was the thyroid cartilage and this is the hyoid bone. We have already demonstrated that. Can you see the superior thyroid notch? Yeah. Can you see the laryngeal prominence? Yes. The so-called Adam's apple. So, this is the cricoid. You can see the cricothyroid muscle. So, the superior thyroid artery will run like this to the superior pole. And just next to that, media to that will be the external laryngeal nerve which will supply the cricothyroid. There is the superior pole of the thyroid and there is the inferior pole. There is the right lobe. This is this mis. This is the superior pole of the thyroid. And there is the inferior pole of the thyroid. And when you bring them together, remember, we said that the posterior lateral relationships is the periods sheath. So, the posterior lateral relationship is a crooked sheath to this side and a crotted sheath because I've pushed them out. They will be the posterior lateral relationships. So here, you can clearly see the cricothyroid muscle. This is the preco-thirteenth muscle of the cell at this time, which is supplied by the external angel now. Running in front of the dead person of the population will be the thyroid aema artery, but here it is not present and that will start from the brachiocephalocytra. So that is what you see here. So these are the structures which I wanted to show you. And I think this more or less shows you some of the branches of the subclavian artery. And you can see some of the intercostal veins, remember on the left side we had the rule of 444. The upper fold drained into the left brachiocephalic vein, the middle fold drained into the left MEA cycles, accessory MEA cycles and the lower fold drained into the MEA cycles. So this is one of those intercostal veins which are drained into the brachiocephalic left. The left brachiocephalic vein is approximately, this is the extent of the right brachiocephalic, the left brachiocephalic is approximately twice the size, but the formation is at the same, sternocleabicular joint, sternocleabicular joint, clear? I think this pretty much shows you everything and we have already seen this, the osteobeliobliogastric and tibeliobliogastric, submental triangle and everything, this is the cut end of the sternocleamaster, cut end of the sternocleamaster. So everything else is seen. Anything else that you would like to do, this is a suvia cord sealant, other end of the, so this will continue into the arm as the axillary and this is the other cut end, you can see it will continue into the chest.