The Digestive System
The digestive system is the group of organs that work together to break down food into nutrients that the body can use for energy, growth, and repair.
Organs of the Digestive System
- Mouth: Food enters the body and is chewed by the teeth, and mixed with saliva which starts the process of digestion.
- Esophagus: The food is then swallowed and moves down the esophagus to the stomach.
- Stomach: In the stomach, the food is mixed with digestive juices that break it down into a liquid form.
- Small Intestine: The liquid food moves into the small intestine where nutrients are absorbed into the bloodstream.
- Large Intestine: Any remaining waste moves into the large intestine where water is absorbed, and the waste is prepared for elimination from the body.
- Liver: The liver produces bile, which helps break down fats in the small intestine.
- Pancreas: The pancreas produces digestive enzymes that help further break down food in the small intestine.
Functions of the Digestive System
The main functions of the digestive system include:
- Ingestion: Taking in food and liquids.
- Digestion: Breaking down food into nutrients.
- Absorption: Taking in nutrients into the bloodstream.
- Elimination: Getting rid of waste from the body.
Study Guide
- What are the main organs of the digestive system?
- What is the function of the liver in the digestive system?
- Describe the process of digestion in the stomach.
- What is the role of the small intestine in the digestive system?
- Explain the functions of the digestive system.
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[Digestive System] Related Worksheets and Study Guides:
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Math in Science - 3rd grade 
Worksheet/Answer key
Math in Science - 3rd grade Worksheet/Answer key
Math in Science - 3rd grade Worksheet/Answer key
Math in Science - 3rd grade
Worksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyThe resources above cover the following skills:
Science as Inquiry and Process (SA1, SA2, SA3)
The student develops an understanding of the processes of science by asking questions, predicting, observing, describing, measuring, classifying, making generalizations, inferring and communicating.
The student develops an understanding of the processes of science by observing and describing their world to answer simple questions.
The student will demonstrate an understanding of the attitudes and approaches to scientific inquiry by answering, 'how do you know?' questions with reasonable answers.
Science as Inquiry and Process: A student should understand and be able to apply the processes and applications of scientific inquiry. A student who meets the content standard should:
Develop an understanding of the processes of science used to investigate problems, design and conduct repeatable scientific investigations, and defend scientific arguments.