Soc 13 - Joints, Movements, Ligaments And Tendons Flashcards
What are the 5 functions of the skeletal system?
- Protection of vital organs
- Muscle attachment
- Joints for movement
- Storing calcium and phosphorus
- Red and white blood cell production
What are the 4 classifications of bones?
- Long bones
- Short bones
- Flat bones
- Irregular bones
What is a joint?
A place where 2 or more bones meet
What are the 4 classifications of joints?
- Pivot
- Hinge
- Ball and socket
- Condyloid
What does a pivot joint do?
Pivot joints allow bones to rotate
What are the shapes of the bones at a pivot joint?
In a pivot joint, one bone shaped like a
cylinder rotates inside another bone or ligament that makes a ring round it.
Where are the 3 pivot joints in your body located?
In your wrist, elbow and neck
What is a hinge joints?
A hinge joint is a joint that allows only backward and forward motion
Where are the 3 hinge joints in your body located?
The knee, elbow and ankle
Explain a Ball and socket joint
In a ball and socket joint, the rounded head of a long bone (the ball) fits into a cup-shaped hole (the socket).
What are 2 examples of ball and socket joints?
The hip and the shoulder joints
Explain what a condyloid joint is
A condyloid joint is similar to a ball and socket joint, but the ball rests against the end of a bone, rather than inside a socket. This allows circular motion.
What is an example of a condyloid joint?
The wrist
What is flexion?
A bending movement that decreases the angle between body parts (e.g. A bicep curl)
Which joints provide flexion?
Shoulder, hip and elbow joints
What is extension?
A straightening movement that increases the angle between body parts (e.g. A swimmer swings their arm backwards in preparation for a racing dive
Which joints provide extension?
Shoulder and hip joints
What is ADDuction?
A movement that pulls towards the midline of the body (e.g. A golfer on the tee swings the club down towards the ball)
Which joints provide adduction?
Shoulder and hip joints
What is abduction?
A movement that pulls away from the midline of the body (e.g.
