 This is a supine cadaver. We have dissected out the right side of the neck. I'm standing on the right side and the camera person is also on the right side. So let's take a look at the boundaries of the carotid triangle. This is the upper part of the sternocleomastoid. This is the posterior boundary. Entering fairly, we have the superior belly of the omohide. And superiorly, we have this muscle here. This is the posterior belly of dagas trache. And under that, we have this muscle. This is the stylohyed muscle. So this is the carotid triangle. And as we have already guessed, contents of the carotid triangle will be the carotid sheath. The roof of this triangle is formed by the platysma. And we can see a remnant of the platysma muscle here. And the floor is formed by the muscular part of the pre tracheal fascia. That is that component of the pre tracheal fascia, which covers the infrared muscles. Now let's take a look at the contents. And for that, I'm going to reflect the sternocleomastoid here. And I'm going to reflect the omohide here. So therefore, we have completely exposed the carotid triangle. And we have also shown the continuity with the infrared temporal fossa. Now let's come to the external carotid artery. And let's take a look at the branches of the external carotid artery. The rule of thumb is one, two, three, one branch medially, which we cannot see because it goes deep inside. That is the ascending pharyngeal artery. Then we have two branches posteriorly. And we can see the two branches posteriorly. This is the other continuation of the external carotid artery. And we can see one branch here. This is the posterior auricular artery. And we can see another branch going posteriorly. And that is this one here. And this is the second branch going posteriorly, which I have lifted up. And this other continuation of that, this is the occipital artery. So posterior auricular and occipital both go posteriorly. The posterior auricular is the one above, occipital is the one below. And this occipital artery goes through the apex of the lateral cervical region, where the sternocleomastoid meets with the trapezius. And that's the reason why this upper part of the lateral cervical region is called the occipital triangle. And then it supplies the posterior part of the scalp. Now let's take the three branches anteriorly from below up. We can see this branch. This is the superior thyroid artery. And we can see that it is accompanied by the superior thyroid vein, which opens into the internal ocular vein. And accompanying the superior thyroid artery in the vein, we can see this nerve here. This is the externalaryngeal nerve. So these three structures run together. This superior thyroid artery, when we are ligating it with hereditomy, we are able to injure the externalaryngeal nerve. So we have to be careful not to injure the externalaryngeal nerve, which supplies the greco thyroid muscle. So this is the first branch that we can see here, the superior thyroid artery. The second branch that we can see here is this one here. This is the lingual artery. And we notice the lingual artery as it comes out, it makes an upward loop. And crossing the lingual artery in front is this nerve here. This is the hypoglossal nerve. So therefore, the hypoglossal nerve crosses in front of the loop of the lingual artery. The lingual artery then disappears into the tongue, deep to the hypoglossus. And the hypoglossal nerve, on the other hand, goes superficial to the hypoglossus, but deep to the myelohyri. And then they ramify inside the tongue. Linguel artery gives deep dorsal lingual arteries, and it also gives the sublingual artery. And the third branch of the external thyroid artery is this one. This is the facial artery. And this facial artery then goes under the posterior belly of the gastric. And now we have reflected the posterior belly of the gastric to show the rest of the course of the facial artery. And we can see this is going. This goes up, and it forms a curve, loop, under the body of the mandible. And we have dissected it out from there. And then it grooves the posterior aspect of the submandibular salivary gland. And we can see the grossly enlarged submandibular salivary gland here. And when I'm reflected, we can see the facial artery traveling. And then it enters into the face. And this is the course of the facial artery on the face. As it enters the face at the lower border of the mandible, it is located just in front of the misceter muscle. And this is the remnant of the misceter muscle. And this is where we can feel its sensation against the mandible. And then it runs a tortuous course along the side of the face. And just adjacent to that is the facial vein. And we can see the facial vein here. And we can see the facial vein is opening into the internal jugular vein here. So these are the six branches of the external carotid artery. Now let's take a look at the termination of the external carotid artery. I have picked up the continuation of the external carotid artery. Now the external carotid artery has traveled under the posterior diagnostic. It is about to reach the infrared temporal fossa. It enters the carotid gland. And this is the carotid gland. And we have separated out from the carotid gland. And we can see that it is dividing into these two terminal branches. This is the larger terminal branch of the external carotid which runs into the intratemporal fossa. And this is the maxillary artery. And this is the smaller terminal branch which divides inside the carotid gland. This is the superficial temporal artery. And we can see the other end of the superficial temporal artery here. It runs in front of the triggers of the ear. It crosses the psychomatic arch and it goes to the temporal region. And it supplies a temporal scan by means of frontal and parietal branches. And we can feel the pulsations of the superficial temporal artery against the zygomatic arch. This is the termination of the external carotid artery.