Topic 11 Human Health. 11.3 The Kidney. 11.3.1 Define excretion. Excretion is the removal from the body of the waste products of metabolic pathways Nitrogen wastes from digestion of proteins Nitrogen wastes are toxic Ammonia (fish – H 2 O can dilute) Urea (Humans, most other mammals)
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11.3 The Kidney
Excretion is the removal from the body of the waste products of metabolic pathways
Two kidneys commonly referred to as left and right kidney.
a) Afferent arteriole a branch of the renal artery.
(b)The Malpighian Body.
(c) Efferent Arteriole (narrower than afferent)
join together to form the renal vein.
(d) Proximal Convoluted Tubule
(e) Loop of Henle.
(f) Distal Convoluted Tubule.
(g) Collecting Duct