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.
One ounce of lean, cooked beef contains 49 calories, meaning that a 12-ounce steak contains approximately 594 calories. This may vary if the steak contains fat or a... One ounce of lean, cooked beef contains 49 calories, meaning that a 12-ounce steak contains approximately 594 calories. This may vary if the steak contains fat or a bone. The nutritional breakdown per ounce of lean beef includes 18 calories from fat and 31 calories from protein. It's important to note that the recommended serving size for beef is between 3 and 4 ounces, meaning that a steak can represent several times the recommended amount of beef for a given meal.