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Excretion in Humans | IGCSE , O Level Biology Power Point
This presentation offers a detailed exploration of excretion in humans, focusing on how metabolic waste products and excess substances are removed to maintain homeostasis. It explains the process of urea formation in the liver via deamination of amino acids, and how urea, along with water, salts, and other small molecules, is filtered from the blood by the kidneys through millions of nephrons. The presentation details each stage of urine formation—from ultrafiltration in the glomerulus to reabsorption in the renal tubules, and finally the storage and expulsion of urine through the ureters, bladder, and urethra. It also contrasts human excretion with water-saving methods in reptiles and birds.
#Excretion, #KidneyFunction, #UrineFormation, #MetabolicWaste, and #Homeostasis.
#Excretion, #KidneyFunction, #UrineFormation, #MetabolicWaste, and #Homeostasis.