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Bones and Joints in the Human Body.

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Introduction

Body in Action There are 206 bones in the human body. The structure of the skeletal system is divided into two areas, the axial skeleton (skull, vertebral column, ribs, sternum) and the appendicular skeleton (bones of the upper and lower limbs). The skeleton provides protection for the body's organs E.g. the cranium protects the soft tissues of the brain. Also the skeletal system supports the body to help people move which is necessary in order to live and do everyday tasks. The skeleton also provides attachment points for muscles to enable body movement. The major bones of the axial skeleton are the skull, the vertebral column, the ribcage, and the sternum. The major bones of the human body are very important and have major functions E.g. ...read more.

Middle

This is the limit of the ball and sockets joint. A type of joint that allows one part to rotate at almost any angle with respect to another. Ball-and-socket joints occur naturally, as in the human hip and shoulder joints, and are also used in machinery. Of all diarthrodial (fully moveable) joints in the body, ball-and-socket joints are the most mobile and allow movement in three planes. Below is an image of a ball and socket joint (hip joint). . Saddle joints enable you to grasp things. A saddle joint allows movement back and forth and up and down, but does not allow for rotation like a ball and socket. This is the limit of saddle joint. ...read more.

Conclusion

Below is a diagram of a pivot joint. Reference picture - www.google.images.co.uk/saddlejoints A hinge joint in your knee and elbow is limited to only move the same way a door operates. A hinge joint allows extension and retraction of an appendage, this is the limit of its movement. Below is an image of the elbow it is a hinge joint. Function of the axial and appendicular skeleton. The 4 main functions of the Skeleton are � Protection � Support � Movement � Blood Cell Production Support The skeleton is the framework of the body, it supports the softer tissues and provides points of attachment for most skeletal muscles. Protection The skeleton provides mechanical protection for many of the body's internal organs, reducing risk of injury to them. For example, cranial bones protect the brain, vertebrae protect the spinal cord, and the ribcage protects the heart and lungs. ?? ?? ?? ?? Ryan McLaughlin ...read more.

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