"Principal, I can't hold it in anymore." Le Yao could only go all out. She started to bend down and cover her stomach, looking like she was about to pee in her pants. "You know, if you hold your urine for too long, it will trigger a series of urinary stones, bladder cancer, and so on…"
"Hehe." Headmaster Ma smiled kindly. "Ten minutes ago, I saw the few of you coming out of the toilet. A person's bladder capacity is between 300 to 500 milliliters, and it takes about two hours to form urine from drinking water. When the blood flows through the glomerulus, other than blood cells and macromolecular proteins, a portion of the water, inorganic salt, glucose, and urea in the plasma can be filtered through the glomerulus into the small renal sac cavity to form the primary urine. The renal tubule will absorb most of the water, all the glucose, and some inorganic salt in the original urine. The remaining waste…"
Le Yao was speechless.
'I'm really impressed!'
