Learners will explore the types of joints and their functions.
After completing this tutorial, you will be able to complete the following:
The place where two or more bones meet is called a joint. Joints enable the human body to move, and are classified by their structure.
Some joints are fixed and do not allow any movement, such as the skull. These joints allow for growth, however not movement. Other joints allow slight movements, such as the vertebrae in the spine. However, most joints are moveable joints, and most of these joints are called synovial joints.
Synovial joints contain a lubricating liquid called synovial fluid that assist with easy movement by providing cushioning and reducing friction. The four most common synovial joints are:
Hinge joints which allow for movement in one plane, and are often compared to the opening and closing of a hinged door. Examples of these types of joints are the knee and elbow.
Ball and Socket joints allow the widest range of movement. They allow rotation in a complete circle. Examples of these types of joints are the shoulders and hips.
Gliding joints allow limited movements. They allow bones to slide or glide past each other. There are gliding joints in the wrists, ankles and spine.
Pivot joints allow bones to spin and twist around other bones, or rotate. This is the type of joint that allows humans to rotate their heads on their necks. Other examples are the forearms and knees.
Overall, joints help bones provide stability and movement so that humans can stand up, sit down and walk by providing flexible connections.
|Approximate Time||20 Minutes|
|Pre-requisite Concepts||Skeletal system|
|Type of Tutorial||Concept Development|
|Key Vocabulary||arm, basketball, body, bones, elbow, human body, joints, movement, muscles, skeletal system, tendons|