Typically, summer temperatures cause people to become dehydrated. Dehydrated people produce concentrated urine.
The color of urine is determined on how concentrated the urine is. It's from all of the toxins being excreted. In the morning it's a fasting urine and you haven't drank fluids all night. So it's concentrated and dark yellow. During the day, you drink and dilute the urine so there more water in the urine, less concentrated and lighter in color
Concentrated, the more excess water is present in the body the more dilute the urine becomes.
Urine is excreted from the kidneys.
During deamination of excess proteins in the body, the amino group of the protein is converted into glycogen for storage and the rest are excreted from the body in the form of urea by urining. Ammonia is found in urea, the more urine is concentrated (yellowish) the more urea it contain (ammonia) and the more it has a bad smell. Therefore as a conclusion : Ammonia comes from the protein you take in.
Our liver converts ammonia into urea. This urea is excreted out in the urine.
The liquids in which the urea is excreted are: Urine and sweat
Urethra
Uroporphyrin is a substance that is excreted in the urine. This is excreted in very small amounts at a time.
Urea is produced by the liver and is excreted by the kidneys as a part of urine.
Urine
Urine
Urine exits the body through the urethra.