Dictionary » D » Digestion




(1) (physiology) The catabolic process in the digestive tract where ingested food is converted into simpler, soluble and diffusible substances that can be assimilated by the body

(2) (microbiology) The process of decomposing organic matter through microbial activity

(3) (medicine) Suppuration


In physiology, digestion pertains to the mechanical and chemical processes to break up food into smaller or simpler constituent parts that can be absorbed or assimilated.

Different organisms utilize different ways to digest food. Some organisms employ external digestion whereas others use internal digestion. Many fungi, for instance, use external digestion in which food is digested from the outside through secreting enzymes that degrade food material and then absorbed through diffusion. With internal digestion, organisms digest their food in a closed system such as through the digestive tract, as in those of many animals.

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Re: drink water, orange juice or Cola before eating?

... agree that drinking while eating can adversely affect the digestive process. Additionally, drinking carbonated beverages brings other factors into digestion. When the carbon dioxide enters the stomach, the pyloric sphincter (which is closed while the first stages of digestion occur in the stomach) ...

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by MamaWrites
Sat Nov 30, 2013 8:40 pm
Forum: Physiology
Topic: drink water, orange juice or Cola before eating?
Replies: 16
Views: 35657


... answers. It seems maybe they do all come from one fertilised egg, but maybe that's just every zooid WITHIN a given group of zooids, like the digestion ones for example. Though from reading, by now I'm pretty sure the whole entire thing comes from one egg. (if so, then how the four specialised ...

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by Waylah
Mon Sep 02, 2013 8:23 am
Forum: Zoology Discussion
Topic: siphonophores
Replies: 2
Views: 1912


Hello!! I am trying to understand a bit of the pathways undertaking anaerobic digestion, but I am quite struggling since I don't come froma biology background. In particular I keep reading a about acetOclastic methanogens and aceticlastic methanogens. I guess only ...

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by science87
Mon Aug 05, 2013 10:44 am
Forum: Molecular Biology
Topic: methanogens
Replies: 0
Views: 753

protein extraction from fat breast tissue

... tissue. My problem is the following : normal bresat tissue is really fatty and the lipids interfere with my peptides quantification after trypsin digestion. I use the micro BCA from Pierce. The problem is that it seems to overestimate the amount of peptides in normal breast tissue lysates compared ...

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by Vero36
Sat May 04, 2013 1:18 pm
Forum: Cell Biology
Topic: protein extraction from fat breast tissue
Replies: 1
Views: 1685


... of diet, which in turn slows down the passage of food in the gut and thus the gut is exposed to some possibly toxic or carcinogenic byproducts of digestion. It could be so that increasing fibre in one's diet negates this phenomenon by making the gut contents pass faster in one's bowels. This is ...

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by wildfunguy
Wed Oct 31, 2012 7:37 pm
Forum: Evolution
Topic: Things that cause cancer (in modern humans who live longer)
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