1 / 21

Digestion, Absorption, Circulation

Digestion, Absorption, Circulation. Consuming Food and Drink. Ingestion – the process of eating or drinking Digestion – breaking down food into small pieces in order to absorb nutrients. Digestive System. Digestive System. Food ingested at the mouth. Digestive System.

theola
Download Presentation

Digestion, Absorption, Circulation

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. Digestion, Absorption, Circulation

  2. Consuming Food and Drink • Ingestion – the process of eating or drinking • Digestion – breaking down food into small pieces in order to absorb nutrients

  3. Digestive System

  4. Digestive System Food ingested at the mouth

  5. Digestive System Food broken down in the stomach

  6. Digestive System Nutrients absorbed into bloodstream through capillaries in small intestine

  7. Ingested/Digested Contaminants Disease causing micro-organisms from contaminated food • Escherichia Coli (E. Coli) • Inflamed stomach and intestine • Severe fatal infection • Listeria monocytogenes • Listeriosis, an infection of central nervous system which can be fatal • Maple Leaf Foods recall (2008) 23 deaths in Canada Workplace chemicals • Cleaners, pesticides • Heavy metal poisoning

  8. E Coli

  9. Protection from Contaminants • Vomiting • Forced removal of contents of stomach and small intestine • Not all contaminants removed • Liver • Filters blood to remove contaminants • Can only filter a limited amount

  10. Skin and Absorption

  11. Epidermis (surface) Dead cells with growing cells underneath, and hair shafts

  12. Dermis contains capillaries and nerves that let you “feel”, and sweat glands to cool

  13. Subcutaneous layer consists of fat cells to insulate body from cold

  14. Absorbed Contaminants Oils, tars, alcohols and pesticides • absorbed through capillaries in dermis Ultraviolet rays or radiation can lead to melanoma Cleaners and workplace chemicals can lead to eczema, skin cancer

  15. Skin rash from exposure to contaminant

  16. Melanoma, skin cancer

  17. Circulatory System:Spreading Contaminants

  18. Blood is circulated around the entire body by the heart • Contaminants absorbed through lungs, digestion, or skin are also circulated around the entire body • Contaminants entering the body at one place can effect a completely different organ

  19. Malaria • Disease transmitted by mosquito bite • Micro-organism spreads throughout the body to the liver, and then infects red blood cells Control Practices by air

More Related