BIO231B Lecture Notes - Lamina Propria, Synovial Fluid, Abdominal Cavity
Document Summary
Function: defense, prevent desiccation, lubrication, digestion, absorption, gas exchange, Structure : epithelial and connective tissue (lamina propria) Function : allows organs to slide over one another and their cavities. Structure: areolar connective tissue covered by mesothelium (lines cavities that don"t open to exterior: parietal layer attached to and lining cavity, visceral layer - covers and adheres to organs, secretes serous fluid. Structure: epidermis keratinized squamous epithelium, dermis dense irregular connective, areolar tissues. Lines cavities that do not open to exterior. Synoviocytes discontinuous layer of cells, secrete some of the components of synovial fluid. Excitable tissues: excitable tissues- respond to external stimuli by altering membrane potential, membrane potential. Electrical charge difference (voltage) that occurs across the cell membrane: in nerve cells: changes in voltage result in rapid transmission of signals to other cells, in muscle cells: changes in voltage result in contraction, shortening the length of the cell. Striated/skeletal muscle: attached to bones (under your control)
