What reply can you give to the child's doubt? You know that
the food we eat is converted to simple absorbable form. This
process is called digestion. This process takes place in the
digestive sytem. The following parts are included in the human
digestive system.
• Mouth • Small intestine
• Oesophsgus • Large intestine
• Stomach • Rectum
• Duodenum • Anus
a) Identify the parts labelled in the illustration and write their names
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The baker's yeast is commercially produced on a nutrient source which is rich in sugar (usually molasses: by product of the sugar refining). The fermentation is conducted in large tanks. Once the yeast fills the tank, it is harvested by centrifugation, giving an off-white liquid known as cream yeast.
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