Human Cells and Digestion: CKSci Teacher Guide


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In this unit, students will trace the path of the digestive system starting with hunger and the purpose of eating food. Students will explore the digestive system and its different parts, understanding the hierarchy of cells, tissues, organs, and organ systems. Students will also look at the building blocks of the body, cells. Students will end with identifying how waste leaves the body and investigating the nutritional needs of our bodies as well.

In this unit, students investigate the human digestive system to identify how our bodies use food for energy. Students will further investigate living things’ need for food in Grade 5 Unit 2 Energy and Matter in Ecosystems.

The human digestive system is the part of our bodies that works to bring food in to be broken down for chemical energy and that eliminates wastes. All body systems are made up of cells, which make up tissues and organs that work together to perform certain functions. Cells are the smallest living parts in our bodies and need energy from the food we eat.

In this unit, students listen and read along with the Teacher Read Aloud of Student Book. Students identify the parts of the digestive system, including cells, tissues, and organs. Students also read about the purpose of eating. Reading about cells and the digestive system is reinforced by teacher demonstrations. Students further explore the digestive system through investigations with their own bodies and through manipulation of objects and materials.

This activity-centered approach requires, at times, that schools collect or purchase materials and equipment that will be needed to complete activities. Click here to see a complete materials supply list for Human Cells and Digestion.

Related Components

  • Student Reader: engagingly written text with many color illustrations, maps, vocabulary sidebars, and a glossary

Preview the Book

Download this CKSci Teacher Guide in its entirety in PDF form.


About CKSci

Core Knowledge Science™ (CKSci) is a comprehensive program covering life science, earth and space science, physical science, and engineering design practices.

CKSci Student Books offer engagingly written text with many color illustrations, photographs that presents scientific information in an ongoing phenomenon-based story. Student Books are designed to be read aloud by the teacher to the students.

Using CKSci in the Classroom

  • For Language Arts: You can also use CKSci to integrate content-rich nonfiction into your Reading/Language Arts lessons. Reading in the sciences provides background content knowledge that aids in reading across all disciplines.

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Paperback (spiral-bound)
8.5 in. W x 11 in. H
65 pages

ISBN: 978-1-68380-612-7

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