Joints And Connective Tissue Flashcards
What is the difference between stretch and tensile strength?
Stretch deals with how long a tissue can become
Tensile strength involves how much pulling force it can resist
What is Wolff’s Law?
Bone density changes in response to the changes in functional forces applied to it
Axial skeleton
Skeleton’s center: cranium, vertebral column, ribs, sternum, and hyoid
Appendicular skeleton
arms and legs, pectoral girdle, and pelvic girdle
Structure of Bones
-1 part Bone cells ( Osteoblasts, osteocytes, and osteoclasts)
-1 part Collagen
-6 parts Inorganic material (mineral salts)
-2 parts Water
Functions of Bone
-Framework
-Spacers
-Shape
-Bear weight
-Support tissues
Compact Bone
densely packed type of bone tissue that makes up bulk of the diaphysis (shaft) of long bones
Spongy Bone
act as little beams (trabeculae) by resisting stress and transferring force
Types of Bone
-Long; femur/humeri
-Short; carpals
-Flat; sternum
-Irregular; vertebrae
-Sesamoid; patella
3 Types of Cartilage
-Fibrocartilage
-Elastic cartilage
-Hyaline cartilage
Fibrocartilage
toughest; affords great tensile strength
Elastic cartilage
pliable; maintains shape of structures
Hyaline (or Articular) cartilage
most abundant; found in the majority of joints involving motion
What is Cartilage?
a dense web of collagen and elastin fibers embedded in a gelatinous ground substance
What does Cartilage help with?
-Provides a smooth, low friction surface for movement and endures tremendous loading
What does Fascial Tissue help with?
-Generate tension, allow tissues to slide smoothly over each other
What is Fascial Tissue?
-the body’s sheets, cables, conduits, and padding; composed of loose or dense connective tissue
What are the 3 groups of Facial Tissues?
- Sheets (proper fascia)
- Cables (tendon and ligament)
- Other variations (superficial fascia and periosteum)
What are the types of Proper Fascia?
-Fascia Profunda
-Septa
-Aponeurosis
-Retinacula
-Joint Capsules
Fascia Profunda
-surrounds muscle bellies, holds them together and separates them into functional groups
Septa
-Separates various muscles of the extremities, so that they can perform their independent functions
Aponeurosis
-Increase stability/strength
Retinacula
-Bind and stabilize the tendons that cross the joints
Joint Capsules
-Provide joint stability and containment
Ligaments
-Connect bones together at a joint; crosshatched fibers support multidirectional stresses
Tendons
-Connects bone to muscle; parallel fibers are pulled unidirectional which move the bone
Tensional Network
-Interconnected fascial tissues (fasciae, tendons, ligaments, etc.)
Connective Tissue Network
-Tensional Network plus bones and cartilage surrounded by body fluid; Holistic system
Functions of the Connective Tissue Network
-Form the complete Structural Framework
-Provides Mechanical Support
Classes of joints based on Function
-Synarthrosis
-Amphiarthrosis
-Diarthrosis
Synarthrosis
-have little or no movement
Amphiarthrosis
-allow minimal to moderate movement
Diarthrosis
freely moveable
Classes of joints based on Structure
-Fibrous
-Cartilaginous
-Synovial
Fibrous
joined by fibrous interosseous connective tissue that directly unites one bone to another
Cartilaginous
joined by either fibrocartilage or hyaline cartilage
Synovial
ends of bony components are free to move in relation to one another
Types of Fibrous Joints
-Suture
-Syndesmoses
-Gomphoses
Types of Cartilaginous Joints
-Symphysis
-Synchondrosis