ANP 1105 Chapter Notes - Chapter 4: Epithelium, Basal Lamina, Loose Connective Tissue

• School: University of Ottawa
• Department: Anatomy and Physiology
• Course: ANP 1105
• Professor: Jacqueline Carnegie

Document Summary

Tissue: groups of cells that are similar in structure and perform a common or related function. Four tissue types: epithelial, connective, nervous, and muscle tissue. Specimen is preserved, then cut into sections, and then stained to enhance contrast. Both differ in structure and function therefore it is called apical-basal polarity. In epithelia that absorb or secrete, microvilli are dense (ex: lining the intestine), and some epithelia have cilia (ex: trachea). Adjacent to the basal surface is the basal lamina. It is non-cellular, consists of glycoproteins, and acts as a selective filter through which molecules diffusing into the epithelium. It also acts as scaffolding which epithelial cells can migrate on to repair a wound. *basal lamina and reticular lamina form basement membrane: specialized contact: except for glandular epithelia, epithelia fit closely together to form continuous sheets. Contacts such as desmosomes and tight junctions bind cells together.