1A60.u2 - Surface Area of a Lung
To model the surface area of a single lung.
Pull out the large plastic sheet with painted veins. Grab 8 magnets to secure the sheet to the front blackboards of the lecture hall. This sheet will span the whole 3 sets of boards. Adhere it to the top of the top boards and lift them up so that it lifts the plastic sheet off of the floor.
If this is being exported to another classroom, ask if a blackboard is available before supplying the magnets. Be sure to emphasize not to rip the sheet (especially if it is exported).
**Please take care to not rip the plastic sheet**
Take the lung out of the bag it is stored in. This represents a small adult lung. When you unfold the sheet, you see the true size of a single lung . The sheet has a surface area of 37.5 square meters.
Because oxygen diffuses through the walls of the alveoli into the enveloping capillaries, surface area plays a key role. The estimated total surface area of lungs vary from 50-75 sq meters, roughly the area of one side of a tennis court.