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mammalian organ which filters the blood to produce urine.
found in the cell wall of xylem cells where the secondary cell wall is absent but the primary...
the spread of cancer cells from the original (primary) malignant tumour to other parts of the...
an autoimmune disease which is treated with insulin injections.
invisible, short-wave radiation emitted by the sun, which can cause cancer in humans.
an extreme shortage of food over a large area which affects a large number of people.