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何谓排泄?机体的排泄途径的有哪些?

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机体将代谢终产物,多余物,异物及药物代谢产物经相应的途径排出体外的过程。(1分)机体的排泄途径有:1)呼吸器官:以气体形式排出C02和少量水;2)消化道。以粪便排出胆色素及一些无机盐类。3)皮肤。以汗排出。4)肾脏。以尿形式排出,排出量大、排泄种类多。(4分)

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