Homestead is a city within Miami-Dade County in the U.S. state of Florida, nestled between Biscayne National Park to the east and Everglades National Park to the west. Homestead is primarily a Miami suburb and a major agricultural area. Homestead was incorporated in 1913 and is the second oldest city in Miami-Dade County next to the city of Miami. It is located approximately 35 miles (56 km) southwest of Miami, and 25 miles (40 km) northwest of Key Largo.
Airways Inside the Lungs. Airways Inside the Lungs. The lungs' airways (bronchial tubes) divide into smaller and smaller branches (bronchioles). The airways end in air sacs (alveoli) where oxygen moves into the blood.
The alveoli in your lungs are covered with tiny blood vessels called capillaries. It's there in your alveoli that the oxygen in the air you breathe passes into your blood via the capillaries. From your capillaries, the oxygenated blood travels to the heart, where it's pumped out to the rest of the cells in your body. The air you breathe every day is important to your health, but did you realize that air pollution can make breathing more difficult and even cause all sorts of health problems? 2  Jump online to check out the Clean Air Detective Follow the instructions to do a basic investigation of the air you breathe every day.