REVISION NOTES
IGCSE Edexcel Biology
2.13 Excretion (in Human)
2.13.1 Know the excretory products of the lungs, kidneys and skin (organs of excretion)
2.13.2B Understand how the kidney carries out its roles of excretion and osmoregulation
2.13.3B Describe the structure of the urinary system, including the kidneys, ureters, bladder and urethra
2.13.4B Describe the structure of a nephron, including the Bowman’s capsule and glomerulus, convoluted tubules, loop of Henle and collecting duct
2.13.5B Describe ultrafiltration in the Bowman’s capsule and the composition of the glomerular filtrate
2.13.6B Understand how water is reabsorbed into the blood from the collecting duct
2.13.7B Understand why selective reabsorption of glucose occurs at the proximal convoluted tubule
2.13.8B Describe the role of ADH in regulating the water content of the blood
2.13.9B Understand that urine contains water, urea and ions
