Articulações: definição e classificação | Anatomia etc

Articulations: Understanding Joints in the Human Body

Introduction to Articulations

• Professor Natália Reinecke introduces the topic of articulations, inviting viewers to subscribe for more anatomy and physiology content.

• Articulations are defined as unions or junctions between two or more bones, with varying forms and functions.

Types of Articulations

Synovial Joints

• Synovial joints (artroses) allow for a wide range of movement and are the most complex type of articulation.

• These joints feature a joint capsule that contains an articular cavity filled with synovial fluid, produced by the capsule itself.

• The surfaces of bones in synovial joints are covered by articular cartilage, which aids in smooth movement.

Fibrous Joints

• Fibrous joints (sinartroses) connect bones through fibrous tissue; they may allow little to no movement depending on fiber length.

• Key types include sutures (e.g., cranial sutures), syndesmoses (e.g., interosseous membrane between radius and ulna), allowing limited movement.

Cartilaginous Joints

• Cartilaginous joints (anfartroses) unite bones via cartilage; they can be primary (synchondroses, temporary growth plates) or secondary (symphyses).

• Secondary cartilaginous joints consist of fibrocartilage, providing slight mobility. Examples include pubic symphysis and intervertebral discs.

Summary of Joint Classifications

• The three main classifications of articulations are:

• Synovial joints: High mobility with joint capsules and synovial fluid.

• Fibrous joints: Limited or no movement connected by fibrous tissue.

• Cartilaginous joints: Slightly movable connections via cartilage.

Conclusion