Excretory Products and their Elimination.

13 lessons101 min6 simulations10 practice questions

This chapter is about how animals get rid of the wastes their metabolism piles up, above all the nitrogen-containing ones. It compares ammonia, urea and uric acid and the excretory organs of different animal groups, then works through the human kidney: the nephron, the three steps of urine formation, what each part of the tubule does, the counter current mechanism that concentrates urine, hormonal control by ADH, renin–angiotensin and ANF, micturition, the help given by lungs, liver and skin, and kidney disorders and their treatment.

Also called: human excretory system · kidney · nephron · urine formation