tag:blogger.com,1999:blog-6438596413011494049.post5045789681102860663..comments2022-04-10T05:29:12.948-07:00Comments on Human Body Systems: In relation to the breathing systemAnonymoushttp://www.blogger.com/profile/02253456323429704658noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-6438596413011494049.post-42480143747126743252012-07-31T14:54:04.649-07:002012-07-31T14:54:04.649-07:00Thank you emma for answering the long type questio...Thank you emma for answering the long type questions and both you and Amani got the truw and false part rightAnonymoushttps://www.blogger.com/profile/02253456323429704658noreply@blogger.comtag:blogger.com,1999:blog-6438596413011494049.post-38244412241762879692012-07-31T01:36:05.576-07:002012-07-31T01:36:05.576-07:002) a. False
b. True
c. False
d. True2) a. False<br /> b. True<br /> c. False<br /> d. Trueamani.maaloufhttps://www.blogger.com/profile/09945427161576301851noreply@blogger.comtag:blogger.com,1999:blog-6438596413011494049.post-62923839712590981852012-07-30T06:46:54.350-07:002012-07-30T06:46:54.350-07:001)FUNCTIONS:
A. The lungs: The chest contains two ...1)FUNCTIONS:<br />A. The lungs: The chest contains two lungs, one lung on the right side of the chest, the other on the left side of the chest. Each lung is made up of sections called lobes. The lung is soft and protected by the ribcage. The purposes of the lungs are to bring oxygen (abbreviated O2), into the body and to remove carbon dioxide (abbreviated CO2). Oxygen is a gas that provides us energy while carbon dioxide is a waste product or "exhaust" of the body.<br /><br />B. The alveoli: At the end of each alveolar duct there are a number of sac-like structures called alveoli, it is within these structures that surfactant is produced. The alveoli are grouped together like a lot of interlinked caves, rather than existing as separate individual sacs.<br /><br /><br />Gas exchange of oxygen and carbon dioxide takes place in the alveoli. Oxygen from the inhaled air diffuses through the walls of the alveoli and adjacent capillaries into the red blood cells. The oxygen is then carried by the blood to the body tissues. Carbon dioxide produced by the body’s metabolism returns to the lung via the blood. It then diffuses across the capillary and alveolar walls into the air to be removed from the body with expiration. The alveoli have a structure specialised for efficient gaseous exchange:<br /><br />1.Walls are extremely thin; 2.They have a large surface area in relation to volume; 3.They are fluid lined enabling gases to dissolve; 4.They are surrounded by numerous capillaries.<br /><br />C. The diaphragm: The diaphragm is located directly below the lungs. Along with the intercostal muscles (the muscles between the ribs), the diaphragm is a major respiration muscle. The diaphragm is a large, dome-shaped muscle that contracts and flattens during inhalation, which causes the chest cavity to expand. This maneuver creates a vacuum which pulls air into the lungs. During exhalation, the diaphragm then relaxes, returns to its previous shape, and air is forced out of the lungs.<br /><br />2) a. False b.true c. false d.trueAnonymoushttps://www.blogger.com/profile/11867829425685242762noreply@blogger.com