Chapter 16: Excretory Products and Their Elimination – Part 3
🐾 Chapter 16: Excretory Products and Their Elimination – Part 3 🌍 Excretion in Other Organisms + Human Accessory Organs 🐸 Excretion in Different Animals Various organisms have evolved different excretory structures based on their body type, habitat, and physiology. Organism Excretory Structure Type of Waste Protozoa (Amoeba) Contractile vacuole Ammonia Platyhelminthes Flame cells (protonephridia) Ammonia Annelids (Earthworm) Nephridia Urea Insects (Cockroach) Malpighian tubules Uric acid Crustaceans Green glands Ammonia Reptiles, Birds Cloaca + uricotelic nature Uric acid Mammals (Humans) Kidneys Urea 🔍 Many aquatic animals are ammonotelic (dilutes easily in water) Land animals prefer ureotelism or uricotelism to conserve water 🌬️ Role of Other Human Organs in Excretion Even though kidneys are the main excretory organs, other organs assist in waste elimination. 🫁 Lungs Excrete CO₂ and water vapour Important in ...