The one and only Rob “Cockeyed” Cockham gives us “Things I Figured Out.” I particularly like this one:
Lungs aren’t bags.
Lungs are where oxygen is introduced into your bloodstream. They hold air, but they aren’t just empty pink sacks.
Lungs are packed full of a complex system of tunnels and pockets, so that every wisp of air is tantalizingly close to blood-engorged capillaries. This plaza of exchange isn’t a big, open stadium, it is a tight system of itty bitty tunnels that lead to 600 million tiny rooms. If you cut open a lung, it isn’t empty inside like a potato-chip sack, it is full of membranes, like a sponge.