Question

Do you know that small amounts of nitrogenous wastes could be eliminated through saliva too?

Answer 1

Part 1: Nitrogenous wastes in humans
The following are the nitrogenous wastes:

• Ammonia
• Urea
• Uric acid

They need to be excreted out to maintain the body homeostasis and to prevent any damage.

Part 2:Saliva composition
It is composed of:

• Water
• Mucus
• Proteins
• Mineral salts
• Amylase
• Urea
• Uric acid
• Creatinine etc.

Part 3: Saliva’s role in excretion
The majority of nitrogenous wastes are excreted by the kidneys through urine but a small amount of it could be eliminated through saliva as its constituent.