BODY WATCH : A Work in Progress : In a year’s time, you blink 8 million times. Your heart beats 37 million times. The list of your body’s feats goes on and on and. . . .

At year’s end, it’s common to tally up your achievements, personal and professional. What you might overlook, though, is how hard your body has been working.

Here are just a few of the feats that the average adult body has accomplished over the past 12 months:

* Your lungs have taken in at least 1,040,250 gallons of air.

* Your heart has pumped about 693,500 gallons of blood.

* Your heart has beat about 36,792,000 times.

* You have blinked about 7,884,000 times.

* Your ciliary muscles, which activate your lenses, have moved about 6,205,000 times.

* You have walked about 1,569 miles--not counting your workouts.

* You have shed about 1 1/2 pounds of skin particles.

* Your fingernails have each grown about 1 1/2 inches.

* Your toenails have each grown about half an inch.

* Your hair has grown five inches or more.

* Your body has taken in 584,000 to 912,500 calories. (If you’re an elite athlete, you’ve inhaled 1,642,500 calories.)

* You have drunk 2,920 glasses of water, if you follow the eight-a-day recommendation.

* You have slept about 2,555 hours.

* You have yawned about 3,650 times, although the number varies greatly, depending partly on whether you hang out with yawners.

Sources: American Dietetic Assn.; Prevention’s Giant Book of Health Facts; Dr. Bernard Raskin, Valencia dermatologist; American Podiatric Medical Assn.; Dr. Michael Rabkin, San Francisco and Brentwood oculoplastic surgeon; National Sleep Foundation; Dr. Michael B. Jorgensen, cardiologist, Kaiser Permanente, Los Angeles; Ronald Baenninger, Temple University psychology professor.