Question: What Are the Elements in the Human Body? Answer: Most of the human body is made up of water, H2O, with cells consisting of 65-90% water by weight. Therefore, it isn't surprising that most of a human body's mass is oxygen. Carbon, the basic unit for organic molecules, comes in second. 99% of the mass of the human body is made up of just six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus. You may also wish to view the element composition of an average human body by mass.
1 The freezer time shown is for best quality only â foods kept constantly frozen at 0Â° F will keep safe indefinitely.  How long does cooked steak last at room temperature? Bacteria grow rapidly at temperatures between 40 Â°F and 140 Â°F; cooked steak should be discarded if left for more than 2 hours at room temperature.
Here's a guide to help you know how long you can keep cuts of meat around! Kitchen Fact: Raw ground meats and poultry should be cooked in 2 days, and roasts, steaks, and chops should be cooked in five days.For raw poultry, ground meats, and other chopped-up cuts of meat, cook them within two days.itchen Fact: Raw ground meats and poultry should be cooked in 2 days, and roasts, steaks, and chops should be cooked in five days. For raw poultry, ground meats, and other chopped-up cuts of meat, cook them within two days.