 So, gingeral fibres are basically collagen fibres, collagen bundles of fibres seen in the connective tissue of ginger, so which are known as gingeral fibres. So it is basically a type 1 collagen. So these connective tissue of marginal ginger, which is densely collagenous, which contains a prominent system of collagen fibre bundles, which are known as gingeral fibres, consists of type 1 collagen. So, functions are to raise the marginal ginger firmly against the tooth and to provide the rigidity necessary to withstand the mascricatory force without being deflected away from the tooth surface. So, bearing the mascricatory force to unite the free marginal ginger with the symptom of the root and adjacent ginger. So uniting the free marginal ginger with the symptom of root and adjacent ginger. So these are the functions of gingeral fibres. Now let's see what are the fibres. So hope you can see this picture. So let me tell you this is the enamel. So this part is enamel and this is enamel, this part and this is alveolar bone, enamel alveolar bone and this is our gingiva, okay. So we have types of fibres, circular dendro gingiva, dendoperiosteal and transeptor. So circular fibres are fibre bundles which run their course in the free gingiva and circle the tooth in a cuff or ring like fashion. So circular gingiva will not be shown here. This is a cross section. So you can see the circular gingiva here, okay, which circles from the top view. So this is the top view of gingiva. This is the side view. So circular fibres you can see this circle, orange colour circle which is circular gingiva which are the fibre bundles which run their course and the free gingiva. It encircles the tooth. So it encircles the tooth. It is not easy to show here. So it encircles the tooth. So that is circular gingiva. Now we have dendro gingiva. That is dendro gingiva fibres which are embedded in cementum of the supra alveolar portion of the root and it projects from cementum in a fan like configuration out to the free gingiva tissue of facial, lingual and interproximal surface. So you can easily understand this. This is dendro. So it starts from cementum and it is fanning out to the free gingiva tissue of facial, lingual and interproximal surface. So it starts from here. It goes like this. That is dendro gingiva fibres. Now next one is dentoperiosteal. Okay. So this is a dentoperiosteal. It starts from cementum. It ends in bone. So this is a periosteum. This is a bone. So dentoperiosteal fibres. So it starts from cementum and it ends in periosteum. So these are the embedded in the same portion of the cementum as dendro gingiva fibres. But they run their course apically over the vestibular and lingual bone crest and terminate the tissue of the attached gingiva. Okay. So this is going apical direction, dento gingiva going coronal direction. So this blue color, this violet color is dento gingiva and this pink color is dentoperiosteal. Okay. This is the bone. So gingiva. So from cementum. So this is a cementum. Okay. So cementum. It is going. So this is enamel. So cementum, cementum. So from cementum, dendro gingiva and dentoperiosteal. Now we have the transceptile fibres. Two transceptile fibres you can see here. Okay. This one which is connecting between two tooth. They extend between the supra alveolar cementum of adjacent teeth. So this is between the teeth. This is cannot be seen from a side view. This should be from top view. So this is a transceptile fibres. It is running between the teeth. That is a, it is runs straight across the interdental septum and are embedded in the cementum of adjacent teeth. Okay. So it was between the teeth. Okay. So it is run straight across the interdental septum. So interdental septum is here. It is going like this, this blue line. Hope you can see this blue line between the teeth. It is known as transceptile fibres. And we have additional fibres which is given by page and co-workers. They are semicircular, transgenjival, intergenjival, interpapillary, intercircular and periosteogenjival. Okay. So periosteogenjival is here. So it starts from periosteum. It goes to the genjiva. And this is circular we have already seen. This is intergenjival. It is between the genjiva, this pink one and transgenjival. It is going between the tissues, genjival tissues, transgenjival. So the remaining fibres are intergenjival, this pink one, transgenjival, this black dot, the intercircular and interpapillary. So interpapillary is this horizontal lines, horizontal violet lines, interpapillary and intercircular and periosteogenjival I have already shown. So when question asked about genjival fibres, we need to draw both the pictures. So this is the principal fibres and this is the additional fibres. Circular, intergenjival, tender periosteal, transceptile. And fibres are semicircular, transgenjival, intergenjival, interpapillary, intercircular and periosteogenjival.