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11 Cards in this Set

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excretion
removal of waste producsts from metabolism
elimination (egestion)
removal of substances such as fibre that have not been involved in metabolic activities
excretory substances:
bile pigments, mineral salts, nitrogenous excretory products (ammonia, urea, uric acid)
ammonia
- very soluble
- very toxic
- excreted by freshwater fisch
urea
- fairly soluble
- fairly toxic
- excreted by mammals
uric acid
- almost insoluble
- almost harmless
- excreted by birds
fibrous capsule
outer membrane that protects the kidney
cortex
a lighter coloured outer region made up of renal capsules
medulla
a darker coloured inner region made up of loops of Henlé
renal pelvis
funnel shaped cavity, collects urine
ureter
tube that carries urine to the bladder