In a similar way to removing solid waste from your body, you must also get rid of fluids. You know the results of the excretory system as urine. Urine is the result of the excretory system balancing the amount of water and salts in your body.
Disruption of Kidney Function Links Cells produce water and carbon dioxide as by-products of metabolic breakdown of sugars, fats, and proteins. Chemical groups such as nitrogen, sulfur, and phosphorous must be stripped, from the large molecules to which they were formerly attached, as part of preparing them for energy conversion.
The continuous production of metabolic wastes establishes a steep concentration gradient across the plasma membrane, causing wastes to diffuse out of cells and into the extracellular fluid. Single-celled organisms have most of their wastes diffuse out into the outside environment.
Multicellular organisms, and animals in particular, must have a specialized organ system to concentrate and remove wastes from the interstitial fluid into the blood capillaries and eventually deposit that material at a collection point for removal entirely from the body.
Regulation of Extracellular Fluids Back to Top Excretory systems regulate the chemical composition of body fluids by removing metabolic wastes and retaining the proper amounts of water, salts, and nutrients. Components of this system in vertebrates include the kidneys, liver, lungs, and skin.
Not all animals use the same routes or excrete their wastes the same way humans do. Excretion applies to metabolic waste products that cross a plasma membrane. Elimination is the removal of feces.
Nitrogen Wastes Back to Top Nitrogen wastes are a by product of protein metabolism. Amino groups are removed from amino acids prior to energy conversion. The NH2 amino group combines with a hydrogen ion proton to form ammonia NH3.
Ammonia is very toxic and usually is excreted directly by marine animals.
Terrestrial animals usually need to conserve water. Ammonia is converted to urea, a compound the body can tolerate at higher concentrations than ammonia. Birds and insects secrete uric acid that they make through large energy expenditure but little water loss.
Amphibians and mammals secrete urea that they form in their liver. Amino groups are turned into ammonia, which in turn is converted to urea, dumped into the blood and concentrated by the kidneys.
Water and Salt Balance Back to Top The excretory system is responsible for regulating water balance in various body fluids. Osmoregulation refers to the state aquatic animals are in: Animals, such as crabs, have an internal salt concentration very similar to that of the surrounding ocean.
Such animals are known as osmoconformersas there is little water transport between the inside of the animal and the isotonic outside environment. Marine vertebrates, however, have internal concentrations of salt that are about one-third of the surrounding seawater.
They are said to be osmoregulators.The excretory system is a collection of organs tasked with removing excess nitrogen and other toxins from the body. The kidneys, liver and large intestine perform most of the filtration duties. Solid waste passes out through the colon, gaseous waste exits the body through the lungs and excess liquid.
It has not been shown conclusively that this system serves as the primary vehicle for excretion. Indeed, there is strong evidence that the digestive tract is the principal excretory organ and that the system described above is chiefly osmoregulatory, with merely ancillary excretory and secretory functions.
Excretion Is Not Elimination The excretory system is very important to your body and only has a few parts. In a similar way to removing solid waste from your body, you must also get rid of fluids. You know the results of the excretory system as urine.
The excretory system is a passive biological system that removes excess, unnecessary materials from the body fluids of an organism, so as to help maintain internal chemical homeostasis and prevent damage to the body. The dual function of excretory systems is the elimination of the waste products of metabolism and to drain the body of used up and broken down components in a liquid and gaseous.
The excretory system is a passive biological system that removes excess, unnecessary materials from the body fluids of an organism, so as to help maintain internal chemical homeostasis and .
The excretory system is essential to one’s health. Its responsibility is to remove waste from the body. The excretory system is made up of numerous organs that work in unison to ensure that waste is effectively removed from your body. Below are the details of the organs of excretory system, along.