https://www.khanacademy.org/science/up-biology-grade-11-revision-course-full-term/x01ceb15d0be61009:week-2/x01ceb15d0be61009:untitled-612/v/excretory-organs-in-animals 2023-05-19T11:51:28.642364191Z Excretory organs in animals Take a look at the different excretory organs of invertebrates. Khadijatul Qubra video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Excretory organs in animals Take a look at the different excretory organs of invertebrates. https://cdn.kastatic.org/ka-youtube-converted/CspzmHuidB0.mp4/CspzmHuidB0.mp4 680 Excretory Products and Their Elimination https://www.khanacademy.org/science/up-biology-grade-11-revision-course-full-term/x01ceb15d0be61009:week-2/x01ceb15d0be61009:untitled-612/e/excretion-in-animals 2026-04-08T00:54:09.631945657Z Excretion in animals This exercise tests your knowledge of ammonotelism, ureotelism, uricotelism, and excretory organs in different animals. Moumita Sen exercise https://www.khanacademy.org/science/up-biology-grade-11-revision-course-full-term/x01ceb15d0be61009:week-2/x01ceb15d0be61009:untitled-612/v/countercurrent-exchange 2025-01-27T11:20:52.400099217Z Countercurrent Exchange In countercurrent multiplication, we saw how water and Na+ were reabsorbed into the interstitium in the Loop of Henle. Where do the reabsorbed substances go? How do they join back the systemic circulation? Watch the video to learn about countercurrent exchange, the mechanism that puts those substances back in the circulation. Nivedhitha Suresh video https://cdn.kastatic.org/ka_thumbnails_cache/83daf1a6-2835-4a9c-85ae-b02b6d9e3194_1280_720_base.png Countercurrent Exchange In countercurrent multiplication, we saw how water and Na+ were reabsorbed into the interstitium in the Loop of Henle. Where do the reabsorbed substances go? How do they join back the systemic circulation? Watch the video to learn about countercurrent exchange, the mechanism that puts those substances back in the circulation. https://cdn.kastatic.org/ka-youtube-converted/aEY7YMbZ9oI.mp4/aEY7YMbZ9oI.mp4 376 Excretory Products and Their Elimination https://www.khanacademy.org/science/up-biology-grade-11-revision-course-full-term/x01ceb15d0be61009:week-2/x01ceb15d0be61009:untitled-612/v/countercurrent-multiplication 2024-12-30T12:17:31.390299683Z Countercurrent Multiplication How are the loops of Henle and the collecting duct involved in producing urine? How does the body conserve its water and other essential nutrients? Watch this video to understand more about the countercurrent multiplication mechanism. Nivedhitha Suresh video https://cdn.kastatic.org/ka_thumbnails_cache/9f04020c-cbbb-4ef8-9f72-db7b9b972e02_1280_720_base.png Countercurrent Multiplication How are the loops of Henle and the collecting duct involved in producing urine? How does the body conserve its water and other essential nutrients? Watch this video to understand more about the countercurrent multiplication mechanism. https://cdn.kastatic.org/ka-youtube-converted/XuFjL-erjC0.mp4/XuFjL-erjC0.mp4 666 Excretory Products and Their Elimination https://www.khanacademy.org/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-the-kidneys/v/glomerular-filtration-in-the-nephron 2023-08-17T23:33:36.770424498Z Glomerular filtration in the nephron This video explores the renal system, focusing on the nephron's role in kidney function. It details the glomerulus's filtration process, the afferent and efferent arterioles' roles, and the function of Bowman's Capsule. The video also explains why fluid leaks out in the glomerulus but not in other arterioles.Leave feedback   Raja Narayan video https://cdn.kastatic.org/googleusercontent/1V_00oQA_8JDiCfsGzAeugIyvs_r4gv5eEKwBFirDsGTA5zGLKIYBaZKJe0c-b0Cfdk_UN95iTFJORj4yq4N6dj6 Glomerular filtration in the nephron This video explores the renal system, focusing on the nephron's role in kidney function. It details the glomerulus's filtration process, the afferent and efferent arterioles' roles, and the function of Bowman's Capsule. The video also explains why fluid leaks out in the glomerulus but not in other arterioles.Leave feedback   https://cdn.kastatic.org/ka-youtube-converted/wWsdcfGta4k.mp4/wWsdcfGta4k.mp4 438 Excretory Products and Their Elimination https://www.khanacademy.org/science/up-biology-grade-11-revision-course-full-term/x01ceb15d0be61009:week-2/x01ceb15d0be61009:untitled-612/e/glomerular-filtration 2026-04-08T00:16:02.937952483Z Glomerular filtration This exercise contains questions on the mechanism of filtration of blood by the glomerulus. Moumita Sen exercise https://www.khanacademy.org/science/up-biology-grade-11-revision-course-full-term/x01ceb15d0be61009:week-2/x01ceb15d0be61009:untitled-612/e/countercurrent-mechanism-and-micturition 2026-01-24T15:20:42.617490009Z Countercurrent mechanism and urination This exercise is on the countercurrent multiplication mechanism and micturition. Moumita Sen exercise https://www.khanacademy.org/science/up-biology-grade-11-revision-course-full-term/x01ceb15d0be61009:week-2/x01ceb15d0be61009:untitled-612/v/regulation-of-kidney-function 2023-06-06T10:35:22.92767095Z Regulation of kidney function Here we describe the roles of ADH, renin-angiotensin system, and ANF in the regulation of kidney function. Khadijatul Qubra video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Regulation of kidney function Here we describe the roles of ADH, renin-angiotensin system, and ANF in the regulation of kidney function. https://cdn.kastatic.org/ka-youtube-converted/PDKAv6xW9_U.mp4/PDKAv6xW9_U.mp4 528 Excretory Products and Their Elimination https://www.khanacademy.org/science/up-biology-grade-11-revision-course-full-term/x01ceb15d0be61009:week-2/x01ceb15d0be61009:untitled-612/e/regulation-of-kidney-function-and-hemodialysis 2026-01-24T15:20:42.617490009Z Regulation of kidney function This exercise has questions on the roles of ADH, renin-angiotensin system, and ANF in the regulation of kidney function. Moumita Sen exercise