I might add that our circulatory system, which has some 60,000 miles (100,000 km) of blood vessels, must be the envy of plumbing engineers, for it has the means to plug leaks and repair itself.
Es varu piebilst, ka mūsu asinsrites sistēmu, kuras asinsvadu kopējais garums ir aptuveni 100 000 kilometru, var apskaust jebkurš ūdensapgādes sistēmu inženieris, jo tā spēj pati apturēt noplūdi un salabot bojāto vietu.