Your heart is located between your lungs in the middle of your chest, behind and slightly to the left of your breastbone (sternum). A double-layered membrane called the pericardium surrounds your heart like a sac.he heart weighs between 7 and 15 ounces (200 to 425 grams) and is a little larger than the size of your fist. By the end of a long life, a person's heart may have beat (expanded and contracted) more than 3.5 billion times.
There are 320 calories in 1 serving of Pei Wei Mongolian Beef. Calorie breakdown: 47% fat, 28% carbs, 25% protein.
Bonus Explainer: Is horse meat good for you? Itâs a little better than beef. A three-ounce serving of roast horse has 149 calories, 24 grams of protein, and five grams of fat. The same amount of beef tenderloin has 179 calories, 24 grams of protein, and nine grams of fat.