Question

How is urine created? (Describe the process as blood travels, filtrate is created, and urine is excreted.)( 400 words essay )

Answer 1

Answer: Urine is formed in the kidneys through a filtration of blood, it is a very important process of our body which excrete out the excessive and unwanted fluid materials from our body. And the color of the urine also indicates the diseased condition of a person. Many of the diseases can be recognized through a urine test.

Our body maintains the process of excreting the waste fluid and it involves three process to perform this function. There are millions of tiny structures present in both of kidneys called as nephrons. Each nephron has a glomerulus, where the blood gets filtered. The glomerulus is a network of capillaries surrounded by the glomerular capsule (or Bowman’s capsule). As soon as blood flows through the glomerulus, blood pressure exerts water, and solutes from the capillaries into the capsule through a filtration membrane. This glomerular filtration begins the urine formation process.

The glomerular capsule pushes the blood through a specialized layer of cells. This filtration membrane, allows water and small solutes to pass but retains blood cells and large proteins. Those components remain in the bloodstream. The fluid that has passed through the membrane flows from the glomerular further into the nephron. The glomerulus filters water and small particles out of the bloodstream. The resulting filtrate contains only waste, but also other substances the body needs such as essential ions, glucose, amino acids, and smaller proteins. The filtrate exits the glomerulus and flows into a duct in the nephron called the renal tubule. The needed substances and some water are reabsorbed through the tube wall into adjacent capillaries. This reabsorption of vital nutrients from the filtrate also helps in creating urine.

Urine mainly consists of water but it also contains many of the other substances that are waste products such as nitrogenous wastes excreted in urine include urea, creatinine, ammonia, and uric acid. Some of the ions such as potassium, sodium, hydrogen, and calcium are also excreted.