Unit 4 Day Anatomy "No bird soars too high if he soars with his own wings." -William BlakeWilliam Blake.

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Presentation transcript:

Unit 4 Day Anatomy "No bird soars too high if he soars with his own wings." -William BlakeWilliam Blake

Today’s Agenda  Objective 13 & 14  Notes on objectives 15 & 16  Match the joint with its description  Types of joints  Model types of joints

Objective 13: Define joint and articulation  Joint = articulation = point where two bones meet.

Objective 14 Describe the criteria used to classify joints structurally and functionally.

Structural Classification  Cartilaginous Joints  Fibrous Joints  Synovial

Functional Classification  Synarthrotic- Immovable  Amphiarthrotic- Slightly Movable  Diarthrotic- Full Movable

Objective 15 Describe the general structure of fibrous joints and give examples of the three common types

Fibrous Joints  Where bones are connected by fibrous tissue.  No joint cavity is present.  Amount of movement dependent on the length of the fibers.

Examples  Sutures of the skull  Filled with very short connective tissue  Adulthood joint becomes ossified and fused together to one unit -- Synostoses

Example (con’t)  Syndesmoses  ligaments that connect the tibia and the fibula  Gomphoses  articulation between the tooth and bony alveolar socket

Practice – Fibrous Jt. 8.What is the difference in a suture and a synostoses? 9. What kind of joint holds a tooth in its bony socket?

Objective 16 Describe the general structure of cartilaginous joints and give examples of the two common types.

Cartilaginous Joints  Bones of these joints are united by cartilage.  No joint cavity is present.

Examples  Synchondroses  Costal Cartilages that connect the ribs to the sternum  Symphyses  Discs that form joints between the vertebra.

Practice – Cart. Jt. 10.What is the main difference between a fibrous joint and a cartilaginous joint? 11. Name two cartilaginous joint?

Diarthrotic Joints  Fully mobile  Aka – Synovial Joint  Contain a space called the synovial cavity and articular cartilage covering the bones of the joint.

Gliding Joint

Ball and Socket Joint

Ellipsoid joint between scaphoid and lunate bones of the wrist

Saddle joint between trapezium of the carpus (wrist)