1 / 12

Excretion

Excretion. Definition. Excretion- the removal of waste products from the body Can be gases or liquids Gases Carbon Dioxide Liquids Urine Sweat. Major organs . Lungs- removal of carbon dioxide and some water Skin- sweat which water, some salts, and organic substances

karik
Download Presentation

Excretion

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Excretion

  2. Definition • Excretion- the removal of waste products from the body • Can be gases or liquids • Gases • Carbon Dioxide • Liquids • Urine • Sweat

  3. Major organs • Lungs- removal of carbon dioxide and some water • Skin- sweat which water, some salts, and organic substances • Urinary system- produces urine which removes water, salts, and metabolic wastes

  4. Skin Structure • Largest Organ in the body • Outermost layer- EPIDERMIS • Dead skin cells used for protection and as a water repellant • Melanin- a skin pigment produces the color of the skin • Inner layer- Dermis • Thicker than the epidermis • Contains blood vessels, nerves, muscles, oil and sweat glands • Innermost layer- Fatty layer

  5. Skin Function • 1. Protection- from germs, bacteria, and viruses • 2. Sensory Response- Your sense of touch • 3. Vitamin D formation-Helps your body absorb calcium and is produced in the presence of ultraviolet light • 4. Regulation of Body Temperature-Blood vessels in the skin can hold or release heat

  6. Functions cont. • 5. Removal of wastes • The skin has 3 million sweat glands • The glands help regulate temperature by cooling the skin • Sweat glands release water, salts, and other waste products

  7. The urinary system • Purpose- rid the blood of wastes • Maintains blood volume by removing excess water

  8. Organs and parts • Kidneys- the filtering devices of the blood • Ureters- lead from the kidney to the bladder • Bladder- storage of the urine until it is ready to be released • Urethra- tube leading from the bladder to the outside for release of the urine

  9. Kidneys • The major filtering device of the kidney is the NEPHRON • Each nephron is made of capsule or cuplike structure called the Bowman’s Capsule • First Filtration- Water, sugar, salt, and wastes • AND the collecting tubule • Water, sugar and salt are reabsorbed in the collecting duct and returned to the blood • Urine is formed here

  10. Disease of the Urinary system • Most common is infection of any part of the urinary system • Sometimes there is blockage of a tube • Development of kidney stones • Some malfunction that requires dialysis- which is the artificial removal of wastes from the blood with a machine

  11. Liver • Part of the digestive system but also filters blood for wastes • Hemoglobin is broken down from RBC to form bile • Excess amino acids are converted to urea • Medications you take are detoxified to be removed from the body

More Related