How does the body primarily eliminate waste?

The body primarily eliminates waste through urine and feces. This is the main excretory process and involves the urinary and digestive systems working to remove byproducts of metabolism and other waste materials.

Urine is produced by the kidneys, which filter blood to remove excess salts, toxins, and urea, a product of protein breakdown. This liquid waste is then excreted through the urethra. Feces, on the other hand, consist of undigested food, bacteria, and other waste materials that are eliminated from the digestive tract through the rectum after being processed in the intestines.

While sweating and breathing do play roles in minor waste elimination, they are not the primary methods. Sweat primarily helps regulate body temperature and can expel small amounts of certain toxins, but it is much less significant compared to urinary and fecal excretion when it comes to overall waste removal. Similarly, breathing primarily facilitates the exhalation of carbon dioxide rather than the elimination of solid waste products. Other options such as elimination through skin and hair or digestion alone do not accurately represent the primary waste removal processes in the human body. Therefore, the correct response highlighting urine and feces is essential for understanding the body's excretory systems.