Beginning with the kidney, trace the organs through which urine travels.

glomerular capsule-PCT-nephron loop-DCT-collecting duct-papillary duct-minor calyx-major calyx-renal pelvis-ureter-urinary bladder-urethra

Competition. interaction among organisms that compete for the same natural resource (food, shelter, water, space) in an ecosystem. predation. an interaction in which one organism kills another for food. predator. prey. symbiosis. mutualisum. commensalisum. parasitisum.

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To see a general view of a microscope slide, use low power. to see a more specific and detailed view, use high power.