1. The human digestive system is a complex series of organs and glands that processes food. In order to use the food we eat, our body has to break the food down into smaller molecules that it can process; it also has to excrete waste. Most of the digestive organs, like the
esophagus and
small intestine, are tube. The digestive system is essentially a long, twisting tube that runs from the mouth to the anus.
2. The start of the process: the mouth
Food is broken down by the
teeth and by the chemical action of salivary enzymes.
3. On the way to the stomach: the esophagus
After the food enters the
pharynx, The esophagus is a long tube that runs from the
pharynx to the
stomach.
Parent Tip: Review the logic above to help your child master the concept of the human digestive system worksheet answer key.
