 Now we shall continue and we will see the axillary artery. The axillary artery starts from the outer border of the first rib and it ends at the lower border of the t-re's major muscle. So therefore this is the extent of the axillary artery where my two fingers are located and this is the axillary artery that I have picked up here. It runs in the axilla and then it continues into the arm of the brachial artery. Let's take a look at the parts of the axillary artery. The axillary artery has also got three parts. The first part is from the outer border of the first rib to the upper border of the pectoralis minor which was here. So this much is the first part. Second part is behind the pectoralis minor so this much is the second part. The third part is from the inferior border of the pectoralis minor to the lower border of the t-re's major. This much is the third part. And the branches are one, two, three. From the first part we have one branch and we can see the branch here. This is the superior thoracic artery which supplies the upper anterior chest wall. From the second part we have two branches. This is the first one of the two branches and we can see this is supplying the lateral side of the chest wall. This is the lateral thoracic artery. The lateral thoracic artery runs with the long thoracic nerve of L which I have picked up here and it runs on the side of the chest wall and supplies the serratus anterior muscle and this lateral thoracic artery also gives multiple branches to the femur brace which are known as lateral mammary branches. That's one branch from the second part. Another branch from the second part is this composite which I have picked up here. This is the thoracochromial artery. The thoracochromial artery has got four subbranches, a pectoral branch, deltoid branch, a chromium and a clavicular branch. And this thoracochromial artery pierces through the osteocorocoid membrane along with the lateral pectoral nerve and supplies all these branches. So these are the two branches from the second part. Now let's come to the third part. The third part has got three branches. We can see this branch here. This is the posterior circumflex fin and we can see the posterior circumflex fin is accompanying the axillary nerve through the quadrangular space. This is one branch. There should be an anterior circumflex fin but we cannot see it very clearly here which is the second branch from the third part. The final branch from the third part is this big artery. This is the subscapular artery. The subscapular artery as it continues down it divides into two major branches and one of that we can see here this is the thoracodorsal artery which accompanies this nerve. This is the thoracodorsal nerve and we can see it is supplying the latsomus dorsi and the other branch is the circumflex scapular which goes through the triangular space and participates in the scapular anastomosis. So these are the three branches from the third part and after that axillary artery becomes continuous as the brachial artery. Let's say a few quick words about the scapular anastomosis. It is essentially an anastomosis between branches of the first part of the subclavian artery and the third part of the axillary artery. And specifically the branches from the first part of the subclavian artery are those coming from the thyroid cervical trunk namely the deep branch of the transverse cervical which is called the dorsal scapular and the supra scapular artery which also comes from the thyroid cervical trunk. These anastomos with the circumflex scapular to form the scapular anastomosis. This is a digital subtraction agigram showing collateral circulation in proximal axillary occlusion. Because of this scapular anastomosis if it is necessary to like it the axillary artery we should do it proximal to the subcappular branch. So that the subcappular artery through the scapular anastomosis can feed the circulation and continue to feed the arm. Additionally there are communications with the dorsal scapular and the posterior dorsal arteries which play a role in coactation of aorta. In coactation of aorta the dilated posterior dorsal arteries and the communications with the dorsal scapular artery produce dancing scapula. So that is scapular anastomosis and the role it plays in axillary occlusion as well as in coactation of aorta. That's all for now. Thank you very much for watching Dr. Sanjay Sanyal, Sunny out. Please like and subscribe if you have any questions or comments. Please put them in the comment section below, have a nice day.