Skeletal system Flashcards
Name the 5 different types bone
Flat bones
Long bones
Irregular bones
Short bones
Sesamoid bones
Where in the body can you find flat bones?
Sternum, ribs, cranium, pelvis
What is the role of flat bones?
They protect internal organs and act as suitable sites for muscular attachment
Give examples of long bones
Femur, humerus, radius, tibia, phalanges
What is the role of long bones?
They act as levers for movement and sites for blood cell production
Give an example of an irregular bones
Vertebrae
Give an example of a short bone
Carpals and tarsals
Give an example of a sesamoid bone
Patella
What role do sesamoid bones have?
protection and reduction of friction
Which bones make up the axial skeleton?
Cranium, Sternum, rib cage, vertebral column
Define the term ‘joint’
Where two or more bones meet
What is a ligament?
A tough band of fibrous, slightly elastic connective tissue that attaches bone to bone
What is articular cartilage?
Smooth tissue that lines the end of each bone
What is the role of ligaments?
Connect bone to bone
Stabilise joints during movement
prevent dislocation of a joint
What is the role of synovial fluid?
Reduces friction and nourishes articular cartilage
What is the role of articular cartilage?
Absorbs shock and allows friction-free movement
What is the joint capsule?
A fibrous sac with an inner synovial membrane
What is the function of the joint capsule?
It encloses and strengthens the joint secreting synovial fluid
What is a bursa?
A closed, fluid-filled sac found where tendons run over bones
What is the function of a bursa?
It reduces friction between tendons and bones and acts as a cushion
Name the 5 types of synovial joint
Hinge joint
Pivot joint
Ball and socket joint
Gliding joint
Condyloid joint
Where can you find a hinge joint?
Elbow, knee and ankle
Where can you find a pivot joint?
Between the axis and atlas at the top of the vertebrae
Where can you find a ball and socket joint?
The hip and shoulder
What is flexion?
Movement which decreases the joint angle
What is extension?
Movement which increases the joint angle