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Excretory System

Excretory System . Anatomy of the Human Body. Excretory System. Excretory System – removes cellular wastes from the body to help maintain a proper balance of body chemicals Organs of the Excretory System: Skin Lungs Urinary System Liver. Metabolic Wastes.

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Excretory System

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  1. Excretory System Anatomy of the Human Body

  2. Excretory System • Excretory System – removes cellular wastes from the body to help maintain a proper balance of body chemicals • Organs of the Excretory System: • Skin • Lungs • Urinary System • Liver

  3. Metabolic Wastes • Metabolic waste – waste (not needed materials) produced by metabolic processes (chemical reactions) • Process of diffusion (and osmosis) allows metabolic waste to move from the intercellular fluid (fluid around cells) and into the blood plasma • Formation of Metabolic Waste • Carbon Dioxide – gaseous waste formed during aerobic respiration • Water – produced by aerobic respiration and other cellular activities • Urea – nitrogen waste resulting from the breakdown of the amino acids produced during protein digestion • Mineral Salts – formed from the breakdown of various compounds in the cell

  4. Organs of the Excretory System • Skin – contains sweat glands that excrete perspiration through skin pores • Perspiration – made up of nitrogenous waste (urea), salts, and water. Plays a role in controlling body temperature • Urinary System – consist of kidneys, ureters, urinary bladder and urethra • Liver – largest internal organ in the body that produces urea, a nitrogenous waste, by breaking down excess amino acids. • Urinary System Video - https://www.youtube.com/watch?v=hiNEShg6JTI

  5. Parts of the Urinary System • Kidneys – bean-shaped organs that lie along the back wall of the abdomen and made up of masses of microscopic units called nephrons. Acts as a filter to remove urea and excess water and salts. • Nephrons – functional units of the kidneys. Regulates the concentration of water and soluble substances like sodium salts by filtering the blood, reabsorbing what is needed and excreting the rest as urine. Also regulates blood volume, blood pressure, pH. • Glomerulus – collection of densely packed capillaries that is surrounded by the bowman’s capsule. Blood plasma is filtered through the capillaries into the bowman’s capsule. • Bowman’s capsule – performs filtration of blood to form urine • Ureters – tube waste travels through from the kidneys to the urinary bladder • Urinary Bladder – sac-like organ where urine is stored temporarily • Uretra – tube that allows urine to travel out of the body from the urinary bladder

  6. Disorders of the Excretory System Kidney Stones – collections of solid materials that may block the kidneys, ureters or urinary bladder Gout – a disease associated with the production and deposition of uric acid crystals in joints. It is a very painful condition that produced symptoms similar to arthritis Uremia – urea and other wastes are not filtered out of the blood. The body cells become poisoned and there is urine in the blood Cirrhosis of the liver – a disease of the liver caused by damage to its cells, leads to a type of high blood pressure, which can cause serious complications. The most common cause is drinking large amounts of alcoholic beverages. Hepatitis, an inflammation of the liver, can also lead to this disease.

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