Organization of the Human
Body
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Printed: March 6, 2015
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C HAPTER
Chapter 1. Organization of the Human Body
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Organization of the Human
Body
Key Concept
The human body is organized at different levels. Cells are organized into tissues, and tissues form organs. Organs
are organized into organ systems, such as the skeletal and muscular systems. All of the organ systems of the human
body work together to maintain homeostasis of the organism. If homeostasis fails, death or disease may result.
Standards
• CA.9–12.LS.9.a
• NSES.9–12.C.5.4; NSES.9–12.C.6.1
• AAAS.9–12.6.C.2
Lesson Objectives
• Outline the levels of organization of the human body.
• Explain how organ systems maintain homeostasis of the body.
Lesson Vocabulary
•
•
•
•
connective tissue: tissue made up of cells that form the body’s structure, such as bone and cartilage
epithelial tissue: tissue made up of cells that line inner and outer body surfaces, such as skin
muscle tissue: tissue made up of cells that can contract; includes smooth, skeletal, and cardiac muscle tissue
nervous tissue: tissue made up of neurons, or nerve cells, that carry electrical messages
Teaching Strategies
Introducing the Lesson
Help students recall what they already know about the organization of multicellular organisms.
• Ask: What are cells? (The basic units of structure and function of living things.)
• Ask: In multicellular organisms, what are the possible levels of organization above the level of the cell?
(Tissue, organ, organ system, and organism.)
Tell students that this lesson focuses on these levels of organization of the human body.
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Building Science Skills
Have students observe several different types of normal human tissues and add sketches of them to their science
notebook. Students can either view histology slides under a microscope or do a Web quest for human histology
images. After students complete the activity, discuss how the tissues differ and how tissue structure is related to
function.
Differentiated Instruction
Start a human biology word mobile for this and subsequent human biology chapters. Partner students with differing
abilities, and assign each pair one or more of the most important vocabulary terms from the chapter. Tell students
to write each term on one side of an index card and a definition, description, or example of the term on the other
side. Provide them with string, tape, and other materials to create a mobile with their completed cards. Display the
mobile in the classroom. LPR, ELL
Enrichment
Suggest that students do the human body systems challenge at the URL below. They will do a word search puzzle
to find 31 terms related to human body systems and then list each term under the correct body system. Completing
the challenge successfully requires relatively detailed knowledge of the human organ systems.
• http://sciencespot.net/Media/hlthhumbdychall.pdf
Science Inquiry
Divide the class into groups and assign each group one of the human body systems. Then, ask groups to complete
the Human Body Quest activity for their assigned organ system (see URL below). Each group will research their
body system and present the information to the rest of the class. Worksheets, links to information, and all other
needed materials are contained in the pdf document.
• http://sciencespot.net/Media/hlthhumbdyquest.pdf
Health Connection
When you discuss homeostasis of the human body, describe diseases that result in a failure of homeostasis, such as
diabetes mellitus (blood sugar cannot be controlled), cirrhosis (liver cannot remove wastes from blood), and kidney
disease (nitrogenous wastes and excess water build up in the body).
Reinforce and Review
Lesson Worksheets
Copy and distribute the lesson worksheets in the CK-12 Biology Workbook. Ask students to complete the worksheets
alone or in pairs as a review of lesson content.
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Chapter 1. Organization of the Human Body
Review Questions
Have students answer the Review Questions listed at the end of the lesson in the FlexBook®.
Points to Consider
In this lesson, you learned that an organ system is a group of organs that work together to do a common job. You
also learned that organ systems help maintain homeostasis of the body.
• The skeletal system is one of the human organ systems. Can you name the organs of the skeletal system?
• How do you think the skeletal system helps the body maintain homeostasis?
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