write down structure function and working of human exeretory system
Answers
Answer:
The human excretory system is bean shaped called as kidney to transport nitrogeneous waste and lungs to transport gaseous waste CO2.the human excretory system consist of 2 kidney,a long pipe to transport urine called as ureter ,a urinary bladder and urethra. the function of kidney is to remove and filter waste.Its working is done by functional unit called nephron.
Explanation:
the blood enters the kidney through reneal artery carrying blood containing nitrogeneous waste.this reneal artery is connected to the functional unit of kidney called nephron . this blood enters the bunch of blood cappilaries called glomerulers above the cup shaped Bowman's capsule . this glomerulers filters substances like urea,uric acid and even useful substances like ammino acid useful salts ,glucose etc.this useful and harmful substances move through the tubules with one end connected to Bowman's capsule and other end connected to the urine collecting duct .The blood that is filtered by glomerulers Move through the blood cappilaries tat is extensively coiled around the U shaped tubules and there the reabsorption of useful substances takes place between blood cappilaries and tubules.Then the filtered blood is moved through the reneal vein to parts of body and the nitrogeneous waste is sent to the urine collecting duct which then moves through ureter to urinary bladder and is excreated out through urethra.