Medical Books and Lectures notes - Free downloads

RESPIRATORY SYSTEM The complex of organs and tissue which are necessary to exchange blood carbon dioxide (CO 2 ) with air oxygen (O 2 ) is called the respiratory system. It consists of structures, which function as ducts, and which together are called the  conductive portion  of the respiratory system structures which form the  respiratory portion  of the respiratory system, in which the exchange of CO 2  and O 2  is occurring and the parts of the thoracic musculo-skeletal apparatus and specialisations of the lung which allow the movement of air through the respiratory system - the  ventilating mechanism . ........ Nasal Cavity The Nasal cavity is divided into three structurally and functionally different parts. The  vestibules   (the first ~1.5 cm of the conductive portion following the nostrils)  are lined with a keratinised stratified squamous epithelium. Hairs, which filter large particulate matter out of the airstream, an...