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excretion - Coggle Diagram
excretion
ultrafiltration
Arterioles branch off the renal artery and lead to each nephron, where they form a knot of capillaries (the glomerulus) sitting inside the cup-shaped Bowman’s capsule
The capillaries get narrower as they get further into the glomerulus which increases the pressure on the blood moving through them (which is already at high pressure because it is coming directly from the renal artery which is connected to the aorta)
This eventually causes the smaller molecules being carried in the blood to be forced out of the capillaries and into the Bowman’s capsule, where they form what is known as the filtrate
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The substances forced out of the capillaries are glucose, water, urea, salts
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kidney
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nephrons
start in the cortex, loop down into the medulla and back up to the cortex
the contents of the nephrons drain into the renal pelvis and the urine collects there before it flows into the ureter to be carried to the bladder for storage
structure
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and is surrounded by a network of capillaries with a knotted section which sits inside the bowman's capsule (glomerulus)
selective reabsorbtion
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glucose
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gates that facilitate the active transport of glucose are only found in the proximal convoluted tubule
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excretory products
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kidneys
urea, water and mineral ions
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carbon dioxide and oxygen are waste products from the metabolic reactions of photosynthesis and respiration, which are lost through the stomata of a leaf
urine is the composition of water, urea and mineral ions.