Why do lungs have small external openings when large openings would let in more air?
Asked by maham237 @ in Biology viewed by 301 People
Asked by maham237 @ in Biology viewed by 301 People
Answered by maham237 @
Answer:
Small external openings of lungs help in two ways:
1. It helps in trapping the dust and pathogens like bacteria, fungal spores et cetera. Larger opening would provide dust and pathogen a wider area to enter into the body.
2. The smaller opening prevents the drying of the respiratory membrane. A moist membrane is essential for the successful exchange of oxygen and carbon dioxide in the lungs.
Asked by admin @ in English viewed by 274 persons
Asked by admin @ in Psychology viewed by 254 persons
Asked by admin @ in Business viewed by 268 persons
Asked by admin @ in Science viewed by 313 persons
Asked by derrick83 @ in Engineering viewed by 398 persons
Asked by admin @ in Biology viewed by 281 persons
Asked by admin @ in Biology viewed by 251 persons
Asked by admin @ in Computer Science viewed by 337 persons
Asked by admin @ in English viewed by 325 persons
Asked by sumit014 @ in Business viewed by 340 persons
Asked by admin @ in Social Sciences viewed by 380 persons
Asked by admin @ in Social Sciences viewed by 368 persons
Asked by admin @ in Geography viewed by 268 persons
Asked by maham237 @ in Mathematics viewed by 369 persons
Asked by maham237 @ in Biology viewed by 292 persons
Asked by admin @ in Biology viewed by 4975 persons
Asked by maham237 @ in Biology viewed by 4111 persons
Asked by maham237 @ in Biology viewed by 3565 persons
Asked by admin @ in Biology viewed by 2690 persons
Asked by maham237 @ in Biology viewed by 2452 persons
Asked by maham237 @ in Biology viewed by 2294 persons
Asked by maham237 @ in Biology viewed by 1977 persons
Asked by admin @ in Biology viewed by 1818 persons
Asked by maham237 @ in Biology viewed by 1557 persons
Asked by maham237 @ in Biology viewed by 1447 persons
Asked by admin @ in Biology viewed by 1311 persons