Bones and Joints Flashcards
Approximately, how many bones make up the skeleton?
206
What is the prefix for bone?
Osteo-
What two groups are the bones in the body divided into?
Axial and appendicular
What is the axial part of the skeleton?
Central core
What is the appendicular part of the skeleton?
Limbs
What are the five types of bone?
Flat
Sesamoid
Long
Short
Irregular
Describe and state function of flat bones, using an example
Thin and large to provide protection for organs. E.g. Cranium protects the brain.
Describe and state function of sesamoid bones, using an example
Found within a tendon to reduce pressure when weight-bearing. E.g. Patella tendon
Describe and state function of long bones, using an example
Longer than they are wide, and are used to provide a lever for movement. E.g. Femur
Describe and state function of short bones, using an example
Found near joints, cuboid-like shape packed into a small space to provide support and stability. E.g. Carpels
Describe irregular bones, using an example
Bones that do not fit into any other category. E.g. Vertebrae
Cancellous bone
Honeycomb structure found at the end parts of bone (epiphysis)
Approximately 20%
Provides shock absorption
Has a good blood supply to provide nutrients
Compact bone
Outer shell - covered in periosteum
Found in the diaphysis (shaft of the bone)
Approximately 80%
Harder so better for protection
What are the five bone functions?
Provide structure
Provides protection
A lever for movement
Mineral storage
Blood cell production
What does the prefix epi mean?
Upon
What does the prefix endo mean?
Within
What does the prefix peri mean?
Around
Fossa
Small depression, pit or cavity
Foramen
Hole or opening
Condyle
Large, round projection that usually articulates with another bone.
Notch
Depression between two prominences
Spine
Ridge/sharp, slender projection of a bone. E.g. spinal process of a vertebra
Process
Prominence
Tubercle
Small rounded prominence on a bone where connective tissues attach.
Tuberosity
A large rounded, or roughened, bony projection where connective tissues and muscles attach.
Trochlea
Any pulley shaped structure
What bone fracture is commonly seen with overuse injuries?
Hairline fractures
What are the 6 types of joints?
Ball and socket
Hinge
Saddle
Pivot
Condyloid
Gliding
Examples of a ball and socket joint
Shoulder (glenohumeral) and hip (femoroacetabular)
Examples of a hinge joint
Elbow, knee and ankle (talocrural)
Example of a saddle joint
Thumb
Examples of a pivot joint
Top of cervical spine and radio-ulna
Example of a condyloid joint
Wrist (Radius and carpals)
Examples of a gliding joint
Carpal (wrist) and subtalar (or talocalcaneal)
Movement in hinge joints
1 axis
Movement in pivot joint
1 axis
Movement in condyloid joint
2 axes
Movement in ball and socket joint
3 axes
Movement in saddle joint
3 axes
Movement in gliding joints
Translation
Function of a ligament?
Connects bone to bone
What does a ligament resist?
Abnormal movement
What happens when a ligament is at limit of normal movement?
Become taught
What does a ligament allow and guide?
Normal movement
What does a ligament provide?
Joint stability
What tissue is a ligament made of?
Collagen
What is the blood supply like in a ligament and why is this important?
Poor blood supply so a slower recovery time
What grade injuries can occur with a ligament?
Grade 1-3 sprain - Grade 3 is a complete tear
Describe ligaments
Connect bone to bone and resist abnormal movement, At limit of normal movement is it taught and allows and guides normal movements, providing joint stability. Ligaments are made of collagen and have a poor blood supply. Injuries vary from a grade 1-3 sprain.
What does a tendon connect?
Muscle to bone
What is the structure of a tendon?
Aponeurosis, blend with periosteum (Aponeurosis is the part that attaches to the bone at the periosteum)
What does a tendon allow and guide?
Normal movement
What does a tendon provide?
Movement at the joint
What tissue makes up a tendon?
Collagen
What is the blood supply like at a tendon and why is this important?
Good blood supply from the mesotenon which allows for a quicker recovery time
What do tendons contain?
Proprioceptors which detect changes in movement and GTO (Golgi tendon organs)
What are the injuries associated at tendons?
Rupture, tendinitis and avulsion fracture (a lot of force through tendon causing bone to be ripped apart)
Describe tendons
Connect muscle to bone, allows and guides normal movement and provides movement at the joint. Aponeurosis attaches to the bone at periosteum. Consists of collagen tissue and has a good blood supply from the mesotenon. Contains proprioceptors and GTO. Injuries: rupture, tendinitis and avulsion fracture.
Articular cartilage
Found around joints and prevents friction between bones and provides shock absorbtion. Lubricated by synovial fluid
Fibrocartilage
Some shock absorption and provides joint stability. Open to injury: osteoarthritis.
Bursae
Small fluid filled sacks
Reduce friction
Semi permeable so nutrients can diffuse in and out
Injury: bursitis