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Digestive system

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Mouth

teeth mechanically break down food

salivary enzymes chemically break down starch

Salivary amylase enzyme mouth GIF

from dynamicscience.com.au

esophagus

food doesn’t “fall down” tube due to gravity

muscles squeeze a food bolus down the tube, towards stomach

Esophagus 1

Pearson Education 2004,Biology: Exploring Life

Here we see an animation of the food muscles pushing the bolus down the esophagus.

esophagus 2 GIF

Stomach

acid kills germs

acid further digests food

Digesting nutrients

 

Small intestine

more enzymes break larger organic molecules into smaller ones.

now small compounds are absorbed into the blood stream.

Small intestne GIF

Pancreas

The pancreas has two major jobs: Digestion, and hormonal control of blood sugar levels.

 

Liver

The liver has several functions: One of them is being part of the digestive system. Read about the liver here.

 

Large intestine

Anything left over continues into the large intestine.

Excess water is absorbed back into the body in the large intestine.

What is left then is undigested food. This is stored in the rectum, the lower part of the large intestine, until we are ready to go to the toilet.

It then comes out of the rectum through the anus as feces (elimination)

 

Large Intestine Colon GIF

Anus

Letfovers are eliminated (defecation) at your convenience.

Related topics

Probiotics and human health

 

Digestive-System-Infographic-Kids-Discover1

 

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