Question

Explain double excretory system in human.

Chapter:- 1 Life Processes

Standard:- 10

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Answer 1

The excretory system consists of the organs that remove metabolic wastes from the body. In humans, this includes the removal of liquid nitrogenous waste in the form of urine, and solid wastes especially from the breakdown of hemoglobin. The removal of urine is accomplished by the urinary tract, while solid wastes are expelled through egestion from the large intestine.

Function of excretory system are:-
The excretory system functions as the bulwark and balance to the digestive system . While we consume food and drink to nourish the body and provide energy, the excretory system ensures that homeostasis is maintained, irrespective of changes to the nutritive value of food.

It regulates the fluid balance of the body, maintaining adequate salt and water levels. When there is excess water, it is removed through the production of hypotonic urine. When we consume salty food, or lose water through perspiration, the concentration of urine is increased, to preserve the osmolarity of body fluids.

The excretory system, especially the urinary tract, is necessary for preventing the toxic build up of nitrogenous wastes, such as ammonia or urea.

The kidneys secrete a hormone called erythropoietin that induces the bone marrow to produce more red blood cells.

Excretory System Facts

The urinary bladder can hold up to 600 ml of liquid. During early pregnancy, the uterus presses on to the bladder, creating a greater frequency of micturition.

Most of the amniotic fluid surrounding the growing fetus is fetal urine, though its composition is very different from normal urine. The bladder of the fetus begins to empty around the 10th week of gestation.

This fetal urine and the amniotic fluid are actually important for the development of fetal lungs.

The white parts in bird excreta are composed mostly of uric acid.

The brownish pigmentation of feces mostly derives from bile salts.

Hope it helped you a lot...

Answer 2

HERE IS YOUR ANSWER,

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The organ system that performs the function of excretion is known as the excretory system. The excretory system removes the waste materials present in the blood.

The primary components of the excretory system are the kidneys, the ureter, the urinary bladder, and the urethra.

When blood reaches the kidneys, useful substances are absorbed back into blood, while the waste materials are dissolved in water and removed from the body in the form of urine.

The urine enters a long tube-like structure called the ureter. The ureter then passes the urine into the urinary bladder, which stores it until it is passed out of the body. Urine is passed out of the body through a muscular tube-like structure called the urethra.

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●● ORGANS INVOLVED IN EXCRETION IN HUMAN BEINGS AND FUNCTION ●●

Bowman's capsule and glomerulus
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Filter the blood passing through them
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Tubular part of nephron
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Reabsorb some substances like glucose, amino acids, salts and a major amount of water
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Collecting duct
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Collect urine from nephrons and joins the ureter
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Ureter
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Collect urine from kidney and passing it onto urinary bladder
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Urinary bladder
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Store urine until the pressure of expanded bladder leads to the urge to pass it out
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Urethra
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Excrete out urine from body

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HOPE IT HELPS U !

# NIKKY