BIOL 240 Lecture Notes - Lecture 3: Cardiac Muscle, Serous Fluid, Pulmonary Pleurae
Document Summary
Lining the body cavities: respiratory and digestive systems. Line body cavities that are closed to the exterior. Lining those organs within the cavities: parietal, outer membrane, lining the cavity, visceral. Inner most membrane, lining those organs: surrounding the organ, serous fluid, fills space between parietal and visceral. Groups of similar cells with a common function: ex. Study of tissues and relationships within the organs. Hypertrophy increase in cell size: happens in muscle cells, cardiac muscle tissue, and skeletal tissue. Atrophy decrease in cell size: weakening of muscles, shrinking of thymus. Hyperplasia/hypergenesis increase in the number of cells: compensation for damage in tissue, smooth muscle retain hyperplasia. Metaplasia change in shape or form of cell in smokers, ciliated columnar epithelium of the trachea becomes stratified squamous epithelium. Matrix: nonliving intracellular substance varies in composition among tissue, ex. Blood is liquid: semisolid cartilage, solid bones. Nervous tissue: composed of neurons composed of some cells called glial cells.
