Post by *christine* on Jul 3, 2014 at 6:16am. 1  We've never been, and there will be 6 kids with us between the ages of 6 (going on 16!) and 15 (going on 25!). Possibly a 3 year old, but not sure she is coming with. 2  We've been there during the day with our kids and it was fine.
alveoli are small air sacs in the lungs as small as a grain of sand there are billions of these in the lungs and the purpose of these alveoli are to supply de oxygenated blood with a supply of oxygen through gas exchangethey are well equipped to do this as well00 million to 400 million alveoli are in each lung each of the alveoli receives blood from the circulatory system capillaries it replaces carbon dioxide and other blood was tes with oxygen
The alveoli are grouped together like a lot of interlinked caves, rather than existing as separate individual sacs. 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 bodyâs 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: Walls are extremely thin.