The document discusses the human digestive system. It begins with digestion occurring in the mouth through chewing and the use of saliva. Next, it describes the physical and chemical breakdown of food into simpler molecules through enzymes. It then explains absorption as the diffusion of simple substances into the blood and elimination as the removal of undigested waste. Diagrams of the anatomy of the digestive system and references are also included.

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GRADE 11

2. This Photo by Unknown Author is licensed under CC BY-SA

3. DIGESTIVE
SYSTEM
This Photo by Unknown Author is licensed under CC BY-NC-ND
This Photo by Unknown Author is licensed under CC
BY-NC

5. 
(Rethabile C. 2018)

6. The first part of digestion
takes place in the mouth
when food is chewed.
Saliva is the digestive
liquid found in the mouth.
Punya, M. (2018).

7. Physical
breakdown of large
food molecules
into simpler
molecules.
Victor Gil Garcia, (2017)

8. Chemical breakdown
of large food
molecules into
simpler molecules
using enzymes.
Victor Gil Garcia, (2017)

9. Process in which the
simple substances get
diffused into the blood.
Aarif, K. (2012).

10. Process of removing
undigested and
unabsorbed food out
of the body.
Prof. Louay, L. (2010).

11. Anatomy of Human Digestion
This Photo by Unknown Author is licensed under CC BY-SA

12.  Punya, M. (2018). Nutrition in animal. Available from Slideshare at
https://www.slideshare.net/PunyatoyaMohanty1/nutrition-in-animals-107733407 (Accessed
18 August 2023)
 Rethabile, C. (2018). Unit 1 Human Nutrition. Available from Slideshare at
https://www.slideshare.net/RETHABILECHABELI/unit-1-human-nutrition (Accessed 18
August 2023)
 Victor Gil, G. (2017). The Digestive System - Anatomy and Physiology - Biology and Geology
3rd CSE – Spain. Available from Slideshare at
https://www.slideshare.net/victorgilgarcia/the-digestive-system-anatomy-and-physiology-
biology-and-geology-3rd-cse-spain-73074088 (Accessed 18 August 2023)
 Aarif, K. (2012). Human Nutrition. Available from Slideshare at
https://www.slideshare.net/prof_aarif/human-nutrition-14097679 (Accessed 18 August
2023)
 Prof. Louay, L. (2010). Human nutrition digestion. Available from Slideshare at
https://www.slideshare.net/DrLouay/human-nutrition-digestion (Accessed 18 August 2023)
REFERENCES

13. END OF THE LESSON