 If we look under the jaw, under the tongue here, we have two glands, two salivary glands. One here, the sublingual gland and then the submandibular gland, right next to it. Now, continuing on with digestion here, we can look at our jaw and we have different types of teeth. So you have your molars here in the back, you have premolars immediately in front of them. My canine has actually gone MIA but it's a pointy tooth and I'll show you in class. Then you have incisors, central, of course, are in the middle and lateral are more off to the side. Now, if we take any of these teeth and we look at them individualistic, we can see they're made up of multiple components. So you have enamel, which is the white part of the tooth on the outside here. Underneath the enamel itself is the dentin, then the pulp inside of that. This top part from about here up is the crown of the tooth, the root of the tooth is the part that actually sticks down into the mandible, into the velar margin. If we look right at the edge of the root there, you can see where it's a little lighter along the edges. This is called cementin. On this particular tooth, we can see it's got a cavity. So this part here, the correct name for a cavity would be a dental carry.