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Excretory System

Excretory System. By: Jared J. De Hoyos Rivera and Luis J. Rosas Román. Types of Excretion. There are four main types of excretion: -Urinary system -Integumentary system -Digestive system -Respiratory system. #1 Organs of the Urinary system.

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Excretory System

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  1. Excretory System By: Jared J. De Hoyos Rivera and Luis J. Rosas Román

  2. Types of Excretion • There are four main types of excretion: • -Urinary system • -Integumentary system • -Digestive system • -Respiratory system

  3. #1 Organs of the Urinary system • The urinary system produces, store, and removes liquid from the body and help maintain homeostasis. • The organs include two kidney, two ureters, the bladder, and urethra.

  4. Kidney • A kidney is a bean-shaped organ that filters, or removes, waste from blood. • You have two kidneys, that are near the back wall of your abdomen. • Each of your kidneys are about the size of your fist and are a dark red color. • The kidneys filter the blood and produce urine in two stages. • You will learn about these in the next slide.

  5. 1st filtration • Blood is constantly circulating and filtering. • The kidney are able to filter about 180 L of blood plasma. • Your body contains about 3 L of blood plasma. • That means blood supply is filter about 60 times each day. • The filtration in cluster of capillaries.

  6. 2nd filter • To regain some of the water from the first filtration, the kidney filter the water collected. • During the second filtration 99% of water and nutrients from the first filtration are separated and reabsorbed. • The remaining liquid and waste products form urine.

  7. Ureter • Urine leaves the kidney through a tube called the ureter. • The ureter is down the kidney.

  8. Bladder • The bladder is a muscular sac that holds urine until the urine is excreted. • The bladder is like a balloon, it contracts when full or empty. • An adult bladder holds 0.5 L of urine.

  9. Urethra • Urine leaves the bladder through the urethra;. • The urethra contains sphincters. • It controls release of urine.

  10. Urinary disorder • A urinary disorder is a disease that affects one or more organs. • Several disorders are relatively common. • Most cause respiratory infections.

  11. Infections

  12. Excretory System and Homeostasis • The excretory system filters waste from the blood. • Another example of maintaining homeostasis is the removal of waste from the digestive system. • An the excretory system also interacts with the nervous system. • The hypothalamus is an area of the brain that helps maintain homeostasis. • One of the functions of the hypothalamus is to control secretion of some hormones.

  13. VIDEO • Mr. Parr • http://www.youtube.com/watch?v=K3Z-Lt58H0s

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