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Whales excrete plumes of liquid feces that are flocculent in nature, consisting of loose aggregations of particles. [2] [4] These feces, often found floating on the sea surface after being excreted underwater before it dissociates, contain undigested hard objects such as squid beaks.
Excretory system
Fish physiology. When threatened, the toxic pufferfish fills its extremely elastic stomach with water. [1] Fish physiology is the scientific study of how the component parts of fish function together in the living fish. [2] It can be contrasted with fish anatomy, which is the study of the form or morphology of fishes.
Aquatic respiration. Sea slugs respire through a gill (or ctenidium) Aquatic respiration is the process whereby an aquatic organism exchanges respiratory gases with water, obtaining oxygen from oxygen dissolved in water and excreting carbon dioxide and some other metabolic waste products into the water.
Cloaca - Wikipedia ... Cloaca
Cestoda - Wikipedia ... Cestoda
Excretion. Mammals excrete urine through the urinary system. Excretion is elimination of metabolic waste, which is an essential process in all organisms. In vertebrates, this is primarily carried out by the lungs, kidneys, and skin. [1] This is in contrast with secretion, where the substance may have specific tasks after leaving the cell.
Fish gill - Wikipedia ... Fish gill