Human excretory system

3 Cell Structure and Function • Introduction • 3.1 How Cells Are Studied • 3.2 Comparing Prokaryotic and Eukaryotic Cells • 3.3 Eukaryotic Cells • 3.4 The Cell Membrane • 3.5 Passive Transport • 3.6 Active Transport • Key Terms • Chapter Summary • Visual Connection Questions • Review Questions • Critical Thinking Questions • 4 How Cells Obtain Energy • Introduction • 4.1 Energy and Metabolism • 4.2 Glycolysis • 4.3 Citric Acid Cycle and Oxidative Phosphorylation • 4.4 Fermentation • 4.5 Connections to Other Metabolic Pathways • Key Terms • Chapter Summary • Visual Connection Questions • Review Questions • Critical Thinking Questions • 11 Evolution and Its Processes • Introduction • 11.1 Discovering How Populations Change • 11.2 Mechanisms of Evolution • 11.3 Evidence of Evolution • 11.4 Speciation • 11.5 Common Misconceptions about Evolution • Key Terms • Chapter Summary • Visual Connection Questions • Review Questions • Critical Thinking Questions • 15 Diversity of Animals • Introduction • 15.1 Features of the Animal Kingdom • 15.2 Sponges and Cnidarians • 15.3 Flatworms, Nematodes, and Arthropods • 15.4 Mollusks and Annelids • 15.5 Echinoderms and Chordates • 15.6 Vertebrates • Key Terms • Chapter Summary • Visual Connection Questions • Review Questions • Critical Thinking Questions • 16 The Body’s Systems • Introduction • 16.1 Homeostasis and Osmoregulation • 16.2 Digestive System • 16.3 Circulatory and Respiratory Systems • 16.4 Endocrine System • 16.5 Musculoskeletal ...

The generation of energy from food leads to the generation of waste too in the human body. The bi-products of the various chemical and physiological processes which are no longer needed for the human body need to be eliminated from the body. For simple organisms such as We all get our nutrients from various sources, which are then digested and processed in our bodies. The process of digestion and metabolism helps us absorb nutrients and generate energy in our bodies. These chemical reactions and processes lead to the production of toxic substances. Following metabolic responses, the body begins to separate helpful and hazardous molecules in an individual. Toxin buildup, as we all know, may be dangerous, and the body eliminates all metabolic wastes through a process known as excretion. These toxic substances, if kept inside the body for a long time, will start affecting it. Hence, they need to be thrown out from the body regularly. The process of excretion makes sure that the body gets rid of the toxic substances from the body time to time. There are various modes of excretion. Depending upon the morphology of the organism, the habitat where it lives, or the kind of waste products generated, excretion takes place in various ways by various means. Excretion can be carried out by lungs, skin, kidneys, etc. Aquatic creatures, for example, fishes, have abundant availability of water, hence the waste generated in fishes is ammonia, which is highly soluble in water. Humans genera...