Multiple choice

Inside human body biomolecules gets break down by

  1. Circulatory system

  2. Respiratory system

  3. Digestive system

  4. Excretory systems
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The digestive system is the series of tubelike organs that convert our meals into body fuel. In all there's about 30 feet (9 meters) of these convoluted pipeworks, starting with the mouth and ending with the anus. Along the way, food is broken down, sorted, and reprocessed before being circulated around the body to nourish and replace cells and supply energy to our muscles.

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