Excretory System Parts And Functions Pdf

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T he excretory system consists of several organs and structures that may have diferent features depending on the animal species. Its main function is to eliminate by filtration waste products resulting from cellular metabolism or incorporated from the environment, for example, during feeding, salt excess in seabirds, etcetera.

Digestive and Excretory Systems

The excretory system is the system of an organism's body that performs the function of excretion, the bodily process of discharging wastes. There are several parts of the body that are involved in this process, such as sweat glands, the liver, the lungs and the kidney system.

Each kidney is made up of three sections: the renal cortex, the renal medulla and the renal pelvis. The blood arrives at the kidney via the renal artery, which splits into many afferent arterioles. These arterioles go to the Bowman's Capsules of nephrons, where the wastes are taken out of the blood by pressure filtration.

Peritubular capillaries also surround the nephron so substances can be taken in and out of the blood. The renal cortex is the outer layer of the kidney and the medulla is the inner layer of the kidney.

Both of the ureters lead the urine into the body's only urinary bladder, which expands and sends nerve impulses when full. Reference Terms. The Excretory system is responsible for the elimination of wastes produced by homeostasis. Every human has two kidneys. The renal pelvis takes urine away from the kidney via the ureter. From there, urine is expelled through the urethra and out of the body.

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Excretory System Facts & Worksheets

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 state. In humans and other amniotes mammals , birds and reptiles most of these substances leave the body as urine and to some degree exhalation, mammals also expel them through sweating. Only the organs specifically used for the excretion are considered a part of the excretory system. In the narrow sense, the term refer to the urinary system. However, as excretion involves several functions that are only superficially related, it is not usually used in more formal classifications of anatomy or function.

The Aging Body pp Cite as. The digestive and excretory systems together function to process all nutrients that enter the bloodstream except the oxygen that is brought in by the respiratory system. Through the digestive system, nutritive substances are absorbed and any that are not are eliminated. The excretory system functions in parallel, eliminating the by-products of metabolism from the cells throughout the body, by its constant cleansing of the blood. Both systems, in addition to serving these life-support functions, also have associated with them numerous psychological meanings regarding the ingestion of food, and the elimination of wastes through the gastrointestinal system and the genitourinary tract. Unable to display preview.

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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 state. In humans and other amniotes mammals , birds and reptiles most of these substances leave the body as urine and to some degree exhalation, mammals also expel them through sweating.

Renal system , in humans , organ system that includes the kidneys , where urine is produced, and the ureters , bladder , and urethra for the passage, storage, and voiding of urine. In many respects the human excretory, or urinary, system resembles those of other mammalian species, but it has its own unique structural and functional characteristics. The terms excretory and urinary emphasize the elimination function of the system. The kidneys, however, both secrete and actively retain within the body certain substances that are as critical to survival as those that are eliminated. The system contains two kidneys, which control the electrolyte composition of the blood and eliminate dissolved waste products and excess amounts of other substances from the blood; the latter substances are excreted in the urine, which passes from the kidneys to the bladder by way of two thin muscular tubes called the ureters.

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Everybody knows that some organs in the human body are necessary for survival: you need your brain, your heart, your lungs, your kidneys Even though you won't find a Valentine's Day card with a kidney on the cover, the kidneys are every bit as important as the heart. You need at least one kidney to live!

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Renal system , in humans , organ system that includes the kidneys , where urine is produced, and the ureters , bladder , and urethra for the passage, storage, and voiding of urine. In many respects the human excretory, or urinary, system resembles those of other mammalian species, but it has its own unique structural and functional characteristics. The terms excretory and urinary emphasize the elimination function of the system.

5 Response
  1. Crisol C.

    The excretory system is the system of an organism's body that performs the function of excretion, the bodily process of discharging wastes.

  2. Ivett L.

    Excretory System. Page 2. Excretory System. • Functions. • Removes wastes from blood. • Removes harmful substances The main organs of the urinary system.

  3. Cono A.

    Organs of the Excretory System Urinary System - kidneys filter the blood to form urine, which is excess water, Overview of Nephron Structure and Function.

  4. Matthew R.

    Function: Collects and removes or excretes excess water,. H2O, urea, carbon dioxide, CO2, and other wastes from our blood that are produced by cells.

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