What Are the Differences Between Urine and Blood?

Many people do not know the difference between urine and blood. In fact, there are significant differences between them. Urine includes proteins, urea solution, glucose, and carbonates, while blood includes glucose, hemoglobin, etc. Urine contains relatively less protein, while plasma contains more protein. Although there are some similarities in their components, there are still many differences that can be distinguished to increase understanding of both.

1. The main difference between urine and plasma is that urine contains less protein and almost no protein components, while plasma contains more protein. The other components of both are basically similar.

2. Their sources are also different. Urine is formed by the filtration of substances such as uric acid and glucose in the blood through the glomerulus. Plasma mainly exists in the blood and is an important component of the extracellular fluid of the human body. It can communicate with the internal and external environments of the body, maintain colloid osmotic pressure and crystal osmotic pressure, etc.

3. When blood flows through the renal tubules, substances such as blood uric acid, urea solution, water, carbonates, and glucose are filtered into the renal capsule according to the filtering function of the renal tubules, producing urine. When urine flows through renal tubular damage, all the glucose, most of the water, and some carbonates that are effective for the body are reabsorbed by the renal tubular damage and returned to the blood around the renal tubular damage. Through the catabolic function of the renal tubular damage, the remaining water, carbonates, urea solution, and blood uric acid produce urine.