Which organ produces Urea and what is the normal blood urea level?

• Organ producing urea: Liver (via the urea cycle).

• Normal blood urea level: 15–40 mg/dL (2.5–6.7 mmol/L).

✅ Tip: 10–20 mg/dL is often quoted in some labs, but values vary slightly with diet, hydration, and lab methods.