Noah Pruitt & Lizzy Burry 5th Period AP Biology

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Presentation transcript:

Noah Pruitt & Lizzy Burry 5th Period AP Biology Excretory system Noah Pruitt & Lizzy Burry 5th Period AP Biology

The Excretory system is responsible for the elimination of wastes produced by homeostasis. Includes: urinary system lungs Skin large intestines liver What is it?

Kidneys: Filters blood of toxins and produces urine Ureters: Tubes that transport urine from kidney to bladder Bladder: Sac that contains urine until needed release Urethra: Transports urine from bladder to outside of body Urinary system

Vasopressin- allows the water to be reabsorbed and controls the volume of urine Aldosterone- responsible for regulating sodium reabsorption these both regulate the concentration of water and salt in the kidneys Hormones in kidneys

There are three processes: filtration, reabsorption, and secretion Filtration- as the filtered blood passes through the glomerulus to the Bowmans capsule small substances pass through capillary walls Reabsorption- the filtrate moves through proximal convoluted tubule some may be absorbed. Small solutes leave and are reabsorbed by the peritubular capillaries. The material that remains in the tubule is urine Secretion- the filtrate then moves through convoluted tubules some substances are secreted from capillaries into tubules How is urine made?

Lungs Cellular respiration produces carbon dioxide waste Carbon dioxide is diffused out of the cells, into the bloodstream Reaching the lungs, alveoli derives the carbon dioxide out of the blood Put into lung tissue to be released during exhalation Lungs

Skin Sweat is also a form of waste Holds urea, salts, and water Sweat glands are mixed with capillaries Waste enters the sweat gland from the capillary and leave the body as sweat Skin

Large Intestines Around 5 feet in length Collects bodily waste Extracts water Allows for solid waste Bacteria, water, and undigested food create feces Anus Large Intestines

Break down any toxins, chemicals, or poisons in the body Creates bile that breaks down fats into usable wastes and fats Bile is stored in gall bladder Converts ammonia into urea Liver

Fun Facts The bladder is as large as the brain 7.8 trillion gallons of fluids are released by the body in its lifespan The largest vein in the body is the one that leads to the kidney Males have a longer urethra than females Fun Facts

Quiz 1. What chemical derives the carbon dioxide from the lungs? 2. The urinary system contains what 4 parts? 3. What organ breaks down any toxins, poisons, or chemicals in the body? 4. The large intestine allows for what sort of waste? 5. What sort of veins are sweat glands mixed with? Quiz

Answers 1. Alveoli 2. Kidney, Ureters, Bladder, Urethra 3. Liver 4. Solid 5. Capillaries Answers

Resources www.sciencedaily.com/articles/e/excretory_system.htm http://www.naturalhealthschool.com/13_1.html http://kidshealth.org/kid/htbw/pee.html http://tw.aisj-jhb.com/viccrusades/2013/05/18/skin-is-the-most- important-organ/ http://www.fotosearch.com/photos-images/intestine.html http://excretorysystem.organsofthebody.com/facts-about- excretory-system.php Resources