The body uses energy so efficiently that an adult riding a bike for one hour at 10 mph uses the amount of energy stored in three ounces of carbohydrates. If your car was this efficient, with gasoline, it would get about 900 miles to the gallon.
Read Palms 139 today and consider that, "You are fearfully and wonderfully made." The average human heart pumps over 1,000 gallons a day, over 55 million gallons in a lifetime. This is enough to fill 13supertankers. It never sleeps, beating 2.5 billion times in a lifetime.
Your lungs contain 1,000 miles of capillaries. The process of exchanging oxygen for carbon dioxide is so complicated that "it is more difficult to exchange O2 for CO2 than for a man shot out of a cannon to inscribe the Lord's Prayer on the head of a pin as he passes by." DNA contains about 2000 genes per chromosome - 1.8 metres of DNA are folded into each cell nucleus. This is like putting 30 miles of fishing line into a cherry pit. And it isn't simply stuffed in, it is folded in. If it is folded one way, the cell becomes a skin cell. If folded another way, it becomes a liver cell, and so forth.
Nature and common sense teach us that order does not evolve out of chaos; it takes design, skill an power to bring order. The same evolutionist who tells you that your amazing body evolved out of some primal soup, and that such amazing order "just happened," also mumbles profanity in frustration when trying to assemble his latest purchase from IKEA, because even though he has a copy of the design, it assembly clearly requires more skill and wisdom than he possesses.
Listen friend, you are precious because a loving and all-powerful God created you, to know Him!