URETHRAL STRICTURE MAIN.pptxAbnormal narrowing of a segment of the Anterior Urethra caused by progressive ischemic spongiofibrosis and scarring of urethral mucosa.
Chronic inflammation damages lung tissues. • Narrowing of airways and loss of elasticity obstruct airflow. • Mucus production and alveolar wall damage impair gas exchange.
21 Enterovirus.ppt The virion of enterovirus consists of a capsid shell of 60 subunites ,each of four proteins(vp1-vp4)arranged with icosahedral symmetry around a genome made up of a single strand of positive –sense RNA.