 So till now we were focusing on the epithelium, epithelium and its various elements, various cells and gingival fibers and parts of gingiva. Now let's move on to the connective tissue. So connective tissue part which is composed of collagen basically around 60% then we have fibroblast around 5% and the remaining 35% includes matrix which has vessels and nerves. So it is known as lamina propria the connective tissue of gingiva is known as lamina propria which has got two parts papillary layer and reticular layer. This papillary layer which is adjacent to the epithelium which consists of papillary projection between the epithelial retepics and reticular layer which is in continuous with periosteum of alveolar bone. So this includes connection with alveolar bone, contiguous with alveolar bone and papillary layer is here. So this is the connective tissue papillary layer which is with projections between the epithelial retepics you can see the projections. So this is the papillary layer and this part is reticular layer. And connective tissue has cellular and extracellular compartments composed of fibres and ground substance. So ground substance is basically composed of proteoglycans, hyaluronic acid, contritin sulfate, glycoproteins mainly fibronectin and fibronectin which binds fibroblasts to the fibres and many other components of intercellular matrix helping mediate cell adhesion and migration. That is fibronectin, fibronectin which fibronectin and we have one more protein which is known as laminin, laminin, so fibronectin which binds fibroblasts to the fibres and many other components of intercellular matrix whereas laminin is another glycoprotein which is found in the base cell lamina serves to attach it to the epithelial cell. So it is attaching to the epithelial cell okay epithelial cell. And we have three types of connective tissue fibres are collagen, reticular and elastic fibres. The collagen type one forms the bulk of lamina propria and provides the tensile strength to the gene travel tissue. So we have collagen, reticular and elastic types and type four collagen which branches between the collagen type one bundle and is continuous with fibres of the basement membrane. Type one and type four type one forms the bulk of lamina propria whereas a type four which branches between the type one. So type four and type one is it type four is going between type one and this and is continuous with fibres of basement membrane and other blood vessel. So the elastic fibre system is composed of oxitalin, elunin and elastin. So the cellular elements, so cellular elements include fibroblast which is a major element which are mesenchymal origin and plays a major role in the development maintenance and repair of gene travel connective tissue which synthesize collagen and elastic fibres as well as glycoproteins and glycosaminoglycans, it regulates collagen degradation through phagocytosis. And also we have mast cell which are numerous in connective tissue and also we have fixed macrophages and histiocytes and also adipose cells and esophils, neutrophils, plasma cells and lymphocytes. So the blood supply of gene travel is basically from three sources. One is supraperiosteal arterioles, supraperiosteal arterioles along the facial and lingual surface of facial and lingual surface of the alveolar bone from which capillary is extend along the circular and gene travel, circular gene travel epithelium and between the retepics of external gene travel surface. So that is supraperiosteal arterioles, next we have vessels of periodontal ligament which extends into the gene travel and anastomose with capillaries in the sulcus area. And third one is arterioles which emerge from the crest of their interendal septum. So that is a blood supply lymphatic drainage from anti-bular incisor region it goes to sub mental lymph node from maxillary palatal gene travel it goes to deep cervical nodes buccal gene travel of maxilla and buccal and lingual gene travel in mantibular primolar molar area which goes to sub mantibular lymph nodes and nerve supply is basically trigeminal nerve. So that was just some finishing points about gene travel, about the blood supply lymph drainage on nerve supply and the cellular elements connected tissue part. So gene travel is a very vast topic the parts of gene travel and the gene travel fibers about the epithelial cells are very important for your exam. So I will come up with periodontal ligament in my next session. Thank you.