âA video diary was kept during the trip and has been used to produce a TV documentary.â âThroughout the study, participants kept a daily symptom diary and completed a quality-of-life questionnaire.â âA travel diary recording all activities is also required to be kept by members in these circumstances.â âMeanwhile, the diaries reveal a later life of flamboyant perversity.â âNelson's well-chosen diary extracts are, apart from anything else, hilarious.â
Your lungs are complex organs, but what they do is take a gas that your body needs to get rid of (carbon dioxide) and exchange it for a gas that your body can use (oxygen). Â­In this article, we will take a close look at how your lungs work and how they keep your body's cells supplied with oxygen and get rid of the carbon dioxide waste. to fail.
Stem cells in the lung. Our lungs work hard. In an average lifetime, human lungs take 20-40 million breaths and experience a daily airflow of between 7000 and 10,000 litres. Mammalian lungs are made up of two distinct regions:1. The conducting airway tubes, including the trachea, bronchi, and bronchioles. 2.n normal lungs, progenitor cells are present in abundance throughout each region. These cells divide to replace old or damaged lung cells, which keeps the lung healthy. The progenitor cells include tracheal basal cells, bronchiolar secretory cells (known as club cells), and alveolar type 2 cells.