EHS 160 Lecture Notes - Lecture 2: Basal Lamina, Pleural Cavity, Thoracic Cavity
11 Jun 2017
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Document Summary
Made up of cranial cavity (brain) and spinal cavity (spinal) ventral cavity. Made up of thoracic cavity ( two pleural cavities - one for each lung) and mediastinum ( includes heart, trachea and esophagus) thoracic cavity. All these spaces lined by epithelia layer called serosa. Epithelial tissue covers surfaces and include glands covering epithelial tissue is in form of sheets covering surface forms boundaries functions of epithelia. 2) attachment b/w cells tight junction - proteins that hold apical and basal parts of cell. Don"t allow proteins from apical surface to go to basal surface desmosomes. Hold cells together but don"t block passage b/w cells. 3) always supported by connective tissue basement lamina and reticular tissue forms basement membrane connective tissue located under basement membrane. 4) epithelial tissue is avascular lacks blood supply gets nutrients by diffusion from basement membrane: innervated by nerves, great regenerative capacity active with mitosis ( always making new cells to replace old cells)
