Question

What are the structures of the excretory system, in order, in the role of producing and eliminating urine?

Answer 1

Hint: Organs in the human excretory system aid in the removal of nitrogenous wastes from the body. The kidney, ureter, urinary bladder, and urethra are the major excretory organs.

Complete answer:
Producing urine: The kidneys filter harmful compounds from the blood and excrete them in urine. Urine is formed in three stages: glomerular filtration, reabsorption, and secretion. Only waste and excess water are eliminated from the body via these methods. The phase of urine formation starts with glomerular filtration. Over a million tiny structures called nephrons are found in each kidney. Each nephron has a glomerulus, which is where blood is filtered. Blood pressure forces water and solutes from the capillaries into the capsule across a filtration membrane as blood passes through the glomerulus. Blood pressure forces fluid from capillaries into the glomerular capsule through a specialized layer of cells within the glomerulus. The filtration membrane allows water and small solutes to move through, but blood cells and large proteins are blocked. Those substances are still present in the bloodstream. The filtrate flows deeper into the nephron from the glomerular capsule. The glomerular filtrate passes through the renal tubule, where nutrients and water are reabsorbed into capillaries. Waste ions and hydrogen ions both travel through the capillaries and into the renal tubule at the same time. This is referred to as secretion. Urine is formed when the secreted ions combine with the remaining filtrate.
Eliminating urine: Urine from the kidneys passes through the ureters and into the urinary bladder. To retain more urine, the bladder extends like an elastic sac. The process of micturition, or urination, starts when it reaches power. Involuntary muscle movements transmit messages to the nervous system, allowing you to choose whether or not to urinate.

Note:
Urine is generated by the kidneys to remove waste. When mineral and acid salts in the urine crystallize and bind together, kidney stones may form. The stone will easily move through the urinary system and out of the body if it is tiny. However, a larger stone may become lodged in the urinary tract. A kidney stone that has become lodged in the kidney causes discomfort and can obstruct the flow of urine.