 So, this is the dissection of the face to show the distribution of the facial vessels. So, let us start from the front of the face. I have picked up a vein here and you can see it here. This is the angular vein, it is called angular vein because it is situated next to the medial canthus of the eye or the medial angle of the eye. This vein is formed by the union of two veins, a big vein which comes from all the way from the vertex like this and that is called the supra-vital vein and a smaller vein medial to that called the supra-trochlear vein and these two unite to form the angular vein. The angular vein receives a small vein from the upper and the lower eyelid called the superior and inferior palpable veins which we cannot see here. And then as it runs down below the lower margin of the orbit, the angular vein becomes known as the facial vein and this is the facial vein which I have picked up here and you can see going all the way down. The facial vein as it descends down, it receives a branch from the nose called the external nasal vein which is also not very big, a superior labial vein and inferior labial vein and we can see the inferior labial vein coming down from here. This is the cut section of the inferior labial vein coming from here. It can also receive a vein from the submental region that is the submental vein, we can see that here. After that what happens, I will tell you when I have demonstrated the lateral side of the face. The upper side of the face we have a vein coming from the frontal region and the vein coming from the parietal region. The frontal and the parietal veins they unite to form what is known as a superficial temporal vein and we can see the superficial temporal vein here. This is the superficial temporal vein. This is the superficial temporal vein. This runs just in front of the tragers of the ear. This also meets a middle temporal vein which we cannot see and the superficial temporal vein then enters into the parotid gland and this is the parotid gland. We can see the superficial temporal vein again on this side. The superficial temporal vein then meets with a vein deep inside the parotid gland. We will see it when we dissect out the parotid and that is called the maxillary vein and after that the superficial temporal vein becomes known as retro mandibular vein. Now this is a very important vein, retro mandibular because it runs behind the ramus of the mandible and we can see the retro mandibular vein here and if you lift up the parotid gland we can see it is coming out from the parotid gland. This is the retro mandibular vein. The retro mandibular vein as it descends down it divides into an anterior division and a posterior division and we can see the anterior division here. The anterior division, this is the anterior division meets with the facial vein which I described just now and we can see it meeting with the facial vein here. The anterior division meets with the facial and then it forms what is known as the common facial vein and the common facial vein then drains into the internal jugular vein. The posterior division of the retro mandibular vein meets with the vein from behind the ear and that is called the posterior auricular vein and then it forms what is known as the external jugular vein which opens into the sub-levean vein. So this is the entire venous drainage of the face. Now here there are some important clinical correlations. If infection travels from here it goes through the superior of thalmic vein into the cavernous sinus. Infection from here can go through the inferior of thalmic vein into the cavernous sinus and infection can travel from here through the facial vein via the deep facial vein into the cavernous sinus. So therefore, this region triangular area from the bridge of the nose all the way to the lateral angle of the mouth including the upper lip. This whole region is referred to as the danger triangle of the face. Any infection in this region can travel via the facial vein or its tributaries to the cavernous sinus and can produce cavernous sinus thrombosis and multiple gradient of palsus. So that is about the venous drainage of the face. Now let's take a look at the artery. This is the facial artery which I have picked up here. Facial artery as you can see is very tortuous and it is a branch of the external carotid which we cannot see here. This facial artery as it runs it first goes under the mandible so therefore we cannot see it here and in this region it makes a groove on the posterior aspect of the submandibular gland and we can see this is the submandibular gland here and it is making a groove in the submandibular gland. And then it comes over the mandible and this is the place where we can feel the pulsation and this is the masseter muscle. So therefore the pulsation of the facial artery is felt against the mandible in front of the masseter muscle and then as it climbs up it gives a branch. We can see it here, a submental branch, it gives an inferior labial branch, it gives a superior labial branch and a lateral nasal branch and then it finishes as the angular artery. So this is the force of the facial artery and before to conclude accompanying the superficial temporal vein is this artery here. This is the superficial temporal artery and this superficial temporal artery is a branch of the external carotid artery and we can feel the pulsation of the superficial temporal artery against the zygomatic arch, this is the zygomatic arch and it is used clinically to palpate the superficial temporal artery by the anesthetists. And finally just a quick overview of the muscles, frontalis muscle on this side, frontalis muscle on this side. This is the orbicularis oculi. You can see the palpibril fibres here and we can see the orbital fibres here. Let us turn this down, palpibril fibres and orbital fibres. Palpibril fibres for gentle closure, orbital fibres for tight closure. Next, we can see some fibres running down here. These are the libator labiaeus superioris alec nasi, which cause cladding of the nose as well as elevation of the upper lip. This muscle that we see here, this is the zygomaticus major and we can feel a fibrus structure here. This is the modulus. The modulus is the meeting point of eight muscles. Three muscles from top, three muscles from below, one from the lateral aspect, one from the medial aspect. The muscle from the lateral aspect is this muscle which is located deep inside here. This is the buccinator muscle and we can see the buccinator is being pierced by the duct of the parotid gland. This is the duct of the parotid gland. This is the parotid gland. Immediately we have this muscle here. This is the orbicularis oris. It goes all around. Then we can see a muscle here. This movement is tracing it down here. Can you see this roughly triangular-shaped muscle here? This is the depressor angular oris. Under that we have the risorius. We have the depressor labiaeus inferioris and deep inside will be the mentalis. Finally, we can see some of these muscle fibres which are running down. We can see part of it has been cut here. This is the platysma muscle which goes all the way down and gets inserted onto the facial. These are the muscles of facial expression that we can see in this dissection. This muscle is not a part of the facial expression but this is the masseter muscle. This is the muscle of mastication. This is the parotid gland which I have already mentioned to you. It has got some accessory glands which we will talk about later. This is the parotid duct which we can see is going and it is piercing this muscle here. This is the buccinator muscle. Then it opens opposite the crown of the second molar tube. This is the cut portion of the facial nerve. We can see it is emerging through the parotid gland. Inside the parotid gland it is a plexus which we cannot see until we open the parotid. That plexus is called the pesancerinas. The facial nerve then divides into two principal trunks. The temporal facial and the cervical facial. This temporal facial then divides into two further branches. The temporal branch and the zygomatic branch. The cervical facial gives three branches. The buccal, the marginal mandibular and cervical. This is what we can see here. Here we can see one of the branches is going to the zygomaticus major. This is the nerve supply of the muscles of facial expression. The muscles of the second brachial arch. Therefore facial nerve is the nerve of the second brachial arch. Parotid surgery is the most common cause of facial nerve injury. These are all the structures that we can see in this section of the face. Thank you very much.