Digestion, Absorption, Circulation
description
Transcript of Digestion, Absorption, Circulation
![Page 1: Digestion, Absorption, Circulation](https://reader036.fdocuments.in/reader036/viewer/2022081507/5681623b550346895dd26d05/html5/thumbnails/1.jpg)
Digestion, Absorption, Circulation
![Page 2: Digestion, Absorption, Circulation](https://reader036.fdocuments.in/reader036/viewer/2022081507/5681623b550346895dd26d05/html5/thumbnails/2.jpg)
Consuming Food and Drink
• Ingestion – the process of eating or drinking
• Digestion – breaking down food into small pieces in order to absorb nutrients
![Page 3: Digestion, Absorption, Circulation](https://reader036.fdocuments.in/reader036/viewer/2022081507/5681623b550346895dd26d05/html5/thumbnails/3.jpg)
Digestive System
![Page 4: Digestion, Absorption, Circulation](https://reader036.fdocuments.in/reader036/viewer/2022081507/5681623b550346895dd26d05/html5/thumbnails/4.jpg)
Digestive System
Food ingested at the mouth
![Page 5: Digestion, Absorption, Circulation](https://reader036.fdocuments.in/reader036/viewer/2022081507/5681623b550346895dd26d05/html5/thumbnails/5.jpg)
Digestive System
Food broken down in the stomach
![Page 6: Digestion, Absorption, Circulation](https://reader036.fdocuments.in/reader036/viewer/2022081507/5681623b550346895dd26d05/html5/thumbnails/6.jpg)
Digestive System
Nutrients absorbed into bloodstream through capillaries in small intestine
![Page 7: Digestion, Absorption, Circulation](https://reader036.fdocuments.in/reader036/viewer/2022081507/5681623b550346895dd26d05/html5/thumbnails/7.jpg)
Ingested/Digested ContaminantsDisease 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
![Page 9: Digestion, Absorption, Circulation](https://reader036.fdocuments.in/reader036/viewer/2022081507/5681623b550346895dd26d05/html5/thumbnails/9.jpg)
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
![Page 10: Digestion, Absorption, Circulation](https://reader036.fdocuments.in/reader036/viewer/2022081507/5681623b550346895dd26d05/html5/thumbnails/10.jpg)
![Page 11: Digestion, Absorption, Circulation](https://reader036.fdocuments.in/reader036/viewer/2022081507/5681623b550346895dd26d05/html5/thumbnails/11.jpg)
![Page 12: Digestion, Absorption, Circulation](https://reader036.fdocuments.in/reader036/viewer/2022081507/5681623b550346895dd26d05/html5/thumbnails/12.jpg)
Skin and Absorption
![Page 13: Digestion, Absorption, Circulation](https://reader036.fdocuments.in/reader036/viewer/2022081507/5681623b550346895dd26d05/html5/thumbnails/13.jpg)
Epidermis (surface)Dead cells with growing cells underneath, and hair shafts
![Page 14: Digestion, Absorption, Circulation](https://reader036.fdocuments.in/reader036/viewer/2022081507/5681623b550346895dd26d05/html5/thumbnails/14.jpg)
Dermis contains capillaries and nerves that let you “feel”, and sweat glands to cool
![Page 15: Digestion, Absorption, Circulation](https://reader036.fdocuments.in/reader036/viewer/2022081507/5681623b550346895dd26d05/html5/thumbnails/15.jpg)
Subcutaneous layer consists of fat cells to insulate body from cold
![Page 16: Digestion, Absorption, Circulation](https://reader036.fdocuments.in/reader036/viewer/2022081507/5681623b550346895dd26d05/html5/thumbnails/16.jpg)
Absorbed ContaminantsOils, 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
![Page 17: Digestion, Absorption, Circulation](https://reader036.fdocuments.in/reader036/viewer/2022081507/5681623b550346895dd26d05/html5/thumbnails/17.jpg)
Skin rash from exposure to contaminant
![Page 18: Digestion, Absorption, Circulation](https://reader036.fdocuments.in/reader036/viewer/2022081507/5681623b550346895dd26d05/html5/thumbnails/18.jpg)
Melanoma, skin cancer
![Page 19: Digestion, Absorption, Circulation](https://reader036.fdocuments.in/reader036/viewer/2022081507/5681623b550346895dd26d05/html5/thumbnails/19.jpg)
Circulatory System:
Spreading Contaminants
![Page 20: Digestion, Absorption, Circulation](https://reader036.fdocuments.in/reader036/viewer/2022081507/5681623b550346895dd26d05/html5/thumbnails/20.jpg)
• 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
![Page 21: Digestion, Absorption, Circulation](https://reader036.fdocuments.in/reader036/viewer/2022081507/5681623b550346895dd26d05/html5/thumbnails/21.jpg)
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