Joints

Question 1

What is a joint

Answer 1

A union between 2 or more rigid components (bone or cartilage)

Question 2

Why are joints needed?

Answer 2

For growth and movement

Question 3

Name the 3 structural classes of joints

Answer 3

Fibrous

Cartilaginous

Synovial

Question 4

What makes up fibrous joints

Answer 4

Dense fibrous connective tissue of high tensile strength

Question 5

Describe movement of fibrous joints

Answer 5

Movement in children (flexible properties). Little movement in adults.

Question 6

Name two types of fibrous joint

Answer 6

Syndesmosis and gomphosis

Question 7

Name the two types of cartilaginous joints

Answer 7

Synchondroses (primary)

Symphyses (secondary)

Question 8

What is the difference between primary and secondary cartilaginous joints?

Answer 8

Primary contain only one type of cartilage, secondary contain two.

Question 9

Explain the purpose of synchondroses?

Answer 9

Allow for bone growth but not movement .

Disappears in adults

(Hyaline cartilage between femur and articular cartilage)

Question 10

Discuss symphyses

Answer 10

They do not ossify with age
They are found in the midline of the body (between 2 vertebrae)
They allow for limited movement

Question 11

Explain the features of synovial joints

Answer 11

They have the greatest movement out of the 3 structural classes of joints 
Common features include:
synovial fluid, 
synovial cavity, 
synovial membrane, fibrous capsule
articular cartilage 
articular disc 
ligaments 
bursae

Question 12

State Hilton’s Law

Answer 12

The nerve supplying a muscle that crosses a certain joint, also innervates this joint