Digestive System
The digestive system is a group of organs working together to convert food into energy and basic nutrients to feed the entire body. Food passes through a long tube inside the body known as the alimentary canal or the gastrointestinal tract (GI tract).
Organs of the Digestive System
- 1. Mouth
- 2. Esophagus
- 3. Stomach
- 4. Small Intestine
- 5. Large Intestine (Colon)
- 6. Rectum
- 7. Anus
Digestive Process
The digestive process begins in the mouth where food is chewed and mixed with saliva. It then travels down the esophagus to the stomach where it is further broken down by stomach acids. The partially digested food then moves to the small intestine where it is mixed with bile and digestive enzymes to extract nutrients. The remaining undigested food then enters the large intestine where water and minerals are absorbed before the waste is eliminated from the body through the rectum and anus.
Functions of the Digestive System
- - Ingestion of food
- - Mechanical and chemical breakdown of food
- - Absorption of nutrients
- - Elimination of waste
Study Guide Questions
- What are the organs of the digestive system?
- Describe the digestive process from the mouth to the anus.
- What are the functions of the digestive system?
- How does the small intestine contribute to the digestion and absorption of nutrients?
- Explain the role of enzymes in the digestive system.
[Digestive System] Related Worksheets and Study Guides:
.◂Science Worksheets and Study Guides Seventh Grade. Ecosystems, food chains and food webs
Study Guide
Ecosystems, food chains and food webs 
Activity Lesson
Ecosystems, Food Chains & Food Webs Worksheet/Answer key
Ecosystems, food chains and food webs Worksheet/Answer key
Ecosystems, food chains and food webs Worksheet/Answer key
Ecosystems, food chains and food webs Vocabulary/Answer key
Ecosystems, food chains and food webs Vocabulary/Answer key
Ecosystems, food chains and food webs Vocabulary/Answer key
Ecosystems, food chains and food webs Vocabulary/Answer key
Ecosystems, food chains and food webs Vocabulary/Answer key
Ecosystems, food chains and food webs
Activity LessonWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyVocabulary/Answer keyVocabulary/Answer keyVocabulary/Answer keyVocabulary/Answer keyVocabulary/Answer keyThe resources above cover the following skills:
LIFE SCIENCE
Ecosystems: Interactions, Energy, and Dynamics
Examine the cycling of matter between abiotic and biotic parts of ecosystems to explain the flow of energy and the conservation of matter.
Analyze and interpret data to provide evidence regarding how resource availability impacts individual organisms as well as populations of organisms within an ecosystem.
Construct an explanation to predict patterns of interactions in different ecosystems in terms of the relationships between and among organisms (e.g., competition, predation, mutualism, commensalism, parasitism).
Engage in argument to defend the effectiveness of a design solution that maintains biodiversity and ecosystem services (e.g., using scientific, economic, and social considerations regarding purifying water, recycling nutrients, preventing soil erosion).