Mucus secreted to embed and transport debris. Bronchus leads to right and left lungs. Asthma is constriction of bronchioles, which reduces or prevents air movement. Terminate in air pockets or sacs termed alveoli. Many Alveoli a.
Right lung has three lobes, left lung has two lobes.
Cone-shaped lungs extend from near neck, filling chest inside ribs, with base broad and concave fitting on diaphragm. Occurs in the alveoli. Passage involves crossing single layer of squamous epithelium surrounded by blood capillaries. Film of lipoprotein lines inner alveolar surfaces to lower surface tension and prevent them from closing up. Mechanism of Breathing Respiration refers to complete process of supplying oxygen to body cells and ridding body of carbon dioxide.