Life Cycle - Human Biology (4A)
Pre Lab 

  • Describing how the human body works.
  • Exploring the organs and systems of the body.
  • organ
  • system

Students review the parts of their body.


The human body is composed of organs that are part of different body systems that allow the human body to work. The design of the body will be explored as well as the different tissues that combine to make the different organs such as the heart and lungs.  In addition, the organs that combine into systems such as the skeletal system or digestive systems need to be explored, since these systems works in groups to serve the needs of the human body.  Students need to become more familiar with the interior of their bodies. At this grade, some of the students are becoming aware of changes in their own bodies and older friends or siblings.   

Human bodies vary a little from person to person, not only in the visible aspects of size and shape but also in the placement of internal organs.  Human bodies, however, do follow a general pattern.  No part of the human body works in isolation; each part does its job, day and night, supported and aided by all the other organs.

  1. Use the Human Body slideshow to review major portions of the body.  
  2. Use the Human Body Placemat to review the organs of the body.  Quiz students to see if they know where the organs are by having select students locate parts of the body. 
  3. Also discuss the major systems of the human body and their functions. Use the human torso to point out the different internal organs.
  4. Read or sing Skeletal Hip Hop with your students. Discuss the skeletal and muscular systems of the human body.   The skeletal model can help you show the different parts. Have the students find some of the bones figured on the placemat on their body. 

    Bone tissue varies in hardness.  The outside of most bones is very hard.  Minerals give bone tissue its hardness.  Inside the bones is a soft material called marrow.  Cartilage is generally found at the ends of bones that move against one another.  Cartilage is a smooth, flexible material that is tissue.  Ligaments  are tissues that may be found at the ends of bones if the bones are still held together.  There are 206 bones in an adult  skeletal system.

    Bones articulate at joints and are held together there and allowed to move with the help of ligaments.  Bones and muscles are attached to each other by means of tendons.  This combination of muscle and bone provides an extraordinarily effective means of movement.  

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