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Full detailed information or notes on "excretion"?

Answer» Which system is good, double coincidence of want or ? money???
EXCRETION\tThe biological process of removal of harmful nitrogenous metabolic waste from the body is called excretion.\tUnicellular organisms excrete by diffusion and multicellular organisms use specialized organ to perform same function.Excretion in human beings\tA pair of kidneys, a pair of ureters, a urinary bladder and a urethra constitutes the human excretory system.\tKidneys are present on either side of the backbone in the abdomen.\tKidneys produce urine and urine from kidney passes through the ureters into the urinary bladder and remains stored their until it is released through the urethra.\tUrine is produced to filter out waste products from the blood.\tNephrons are basic structural and functional unit of kidney.\tCluster of thin walled blood capillaries called\xa0glomerulus\xa0in the nephron filtrate the urine and each cluster is associated with cup shaped end of a tube called\xa0Bowman’s capsule.\tSubstances like glucose, amino acids, salts and a major amount of water is selectively reabsorbed from the initial filtrate as the urine flows along the tube.\tReabsorption depends on the amount of excess water in the body and dissolved waste to be excreted.\tThe urine from kidney enters the long tube called ureter.\tUreter connects the kidney with the urinary bladder and urine from the kidney is passed to urinary bladder and stored in the bladder.\tWhen the pressure in the expanded bladder leads to the urge to urinate, the urine is passed out through urethra.


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