The Human Digestive System

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What is digestion?Digestion can be defined as the complex breakdown of food into forms that our bodies can use. Our bodies use food as fuel to provide energy for work, play and growth. Your digestive system is responsible for converting the food we eat into energy for our bodies to use.

Types of DigestionThere are two types of Digestion. They are:

ChemicalPhysical

Chemical Digestion Chemical digestion involves

breaking down the food into simpler nutrients that can be used by the cells.

Chemical digestion begins in the mouth when food mixes with saliva. 

Saliva contains an enzyme (amylase) that begins the breakdown of carbohydrates. 

 

Mechanical or Physical DigestionMechanical digestion starts

in the mouth by chewing, swallowing and the muscular movements that move food through the digestive tract.

Mechanical digestion support chemical digestion by physically breaking whole foods into smaller pieces to facilitate chemical breakdown.

Physical and Chemical Digestionbodyparts

Ph level

mouth neutral 7

stomach acidic 1.5 – 2.5

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lipasetripaserenin

Digestion process

stomach

Small intestine

large intestineanus

mouth

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Which one shows the digestion process?

Which of the following picture is apart of the digestive system

teethLarge intestine Kidneys

WHICH OF THE FOLLOWING CHURNS FOOD EVERY FOUR HOURS.

stomach

MOUTH

Small intestine

Large intestine

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