Which organ is responsible for removing nitrogenous waste by producing urea?

Asked By: Houston Exon | Last Updated: 28th February, 2020
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Nitrogenous Waste in Terrestrial Animals: The Urea Cycle
Urea is made in the liver and excreted in urine.

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Similarly one may ask, what is responsible for removing nitrogenous waste such as urea from the blood?

Humans have two kidneys and each kidney is supplied with blood from the renal artery. The kidneys remove from the blood the nitrogenous wastes such as urea, as well as salts and excess water, and excrete them in the form of urine.

Additionally, what system removes waste products from the blood and maintains water balance? The complex filtration within the kidneys requires over 100 miles of blood vessels. Through a process of continual and complex filtration, the urinary system collects metabolic waste products from the blood and removes them from the body while maintaining the proper balance of water and electrolytes in the blood.

Also, what converts dangerous nitrogenous wastes into urea?

The skin excretes excess water, salts, and a small amount of urea in sweat, the lungs excrete carbon dioxide and small amounts of water vapor, the liver converts potentially dangerous nitrogen wastes, a product of protein breaking down, into less toxic urea, & the kidneys produce and excrete a waste product known as

What organs contribute to homeostasis by removing nitrogenous waste from the blood?

The kidneys function to filter nitrogenous wastes (mostly urea and uric acid) from the blood and expel them through urine.

39 Related Question Answers Found

What removes nitrogenous waste from the body?

The excretory system serves to remove these nitrogenous waste products, as well as excess salts and water, from the body. When cells break down carbohydrates during cellular respiration, they produce water and carbon dioxide as a waste product.

Why is it important to remove nitrogenous waste from the body?

Excess nitrogen is excreted from the body. Nitrogenous wastes tend to form toxic ammonia, which raises the pH of body fluids. The animals must detoxify ammonia by converting it into a relatively nontoxic form such as urea or uric acid.

What is the difference between uric acid and urea?

In contrast, mammals (including humans) produce urea from ammonia; however, they also form some uric acid during the breakdown of nucleic acids. In this case, uric acid is excreted in urine instead of in feces, as is done in birds and reptiles. Uric acid is also less toxic than ammonia or urea.

Is creatinine a nitrogenous waste?


Creatinine. Creatinine is a nitrogenous waste product that, like urea, is transported in the blood to the kidney where it is excreted in the urine.

Where do nitrogenous wastes come from?

Nitrogenous waste products have their origin in the breakdown of proteins by cells. Cells catabolize amino acids to obtain energy. The first step of this process is deamination. During deamination, enzymes remove the amino group as ammonia (NH3).

How is urea produced?

Urea is naturally produced when the liver breaks down protein or amino acids, and ammonia. The kidneys then transfer the urea from the blood to the urine. Extra nitrogen is expelled from the body through urea, and because it is extremely soluble, it is a very efficient process.

How is urea converted to ammonia?

Ammonia is a toxic product of nitrogen metabolism which should be removed from our body. The urea cycle or ornithine cycle converts excess ammonia into urea in the mitochondria of liver cells. The urea forms, then enters the blood stream, is filtered by the kidneys and is ultimately excreted in the urine.

What three substances make up most of urine?


Urine is an aqueous solution of greater than 95% water. Other constituents include urea, chloride, sodium, potassium, creatinine and other dissolved ions, and inorganic and organic compounds.

Why do fish excrete ammonia instead of urea?

Fish. Fish excrete nitrogenous waste as ammonia; this is unusual because ammonia is highly toxic therefore storage in the body can pose a risk.

What is the advantage of excreting nitrogenous waste in the form of uric acid?

Conversion of ammonia into uric acid is more energy intensive than the conversion of ammonia into urea. Producing uric acid instead of urea is advantageous because it is less toxic and reduces water loss and the subsequent need for water.

What is the term for a concentration of urea and other nitrogenous wastes in the blood?

uremia. increase in concentration of urea and other nitrogenous wastes in the blood.

What are the nitrogenous wastes found in urine?

Nitrogen wastes
They are ammonia, urea, uric acid, and creatinine. All of these substances are produced from protein metabolism. In many animals, the urine is the main route of excretion for such wastes; in some, the feces is.

Which is the major nitrogenous waste in human being?


A) The major nitrogenous waste product in human beings is urea - mainly excreted as urine. b) Urea is excreted from the blood circulation by ultra-filtration in the kidneys. It is this filtrate that forms urine which is then excreted via the urinary organs.

Why ammonia is more toxic than urea?

Urea is more toxic than uric acid because, Urea is a less toxic compound than ammonia; two nitrogen atoms are eliminated through it and less water is needed for its excretion. It requires 0.05 L of water to excrete 1 g of nitrogen, approximately only 10% of that required in ammonotelic organisms.

How do plants excrete nitrogenous waste?

Plants also excrete nitrogenous compounds that are produced in protein metabolic reactions. Another method is transpiration, whereby plants excrete excess water through their leaves, which are suffused with stomatal pores, or they cause this water to profuse from fruits and stems.