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Friday, August 1, 2008

Joints - Images

Colourful images of various types of joints are given under this post. Observe the arrows given in diarthroses that explain whether the joint is monaxial, biaxial or nonaxial depending on the number of axes around which movement is possible at the joint.

* Coronal Suture is between frontal and parietal bones.
* Observe the chord-like ligament and sheet-like interosseous membrane
* Periodontal Membrane joins root of tooth to the alveolar socket in thecodont teeth * When the elongation of the bone caeses, epiphyseal plate (hyaline cartilage without perichondrium) is replaced by bone, thus, he joint becomes a synostosis (bony joint) * Functionally, symphysis is an amphiarthrose (slightly movable joint) and facilitates parturition (labour)
* Observe that ball bearing bone can rotate around several axes (multiaxial)
* Hinge joint allows motion around only one axis (monaxial) * Classic example of pivot joint is the atlanto-axial joint, that permits the head to turn from side to side as when you shake your head while saying "no". Radioulnar joint shown here enables palms to turn anteriorly and posteriorly * Notice the arrow marks that explain the biaxial nature of saddle joint.


  1. i loved learning the joints with the help of diagrams ..thank you sir!!!

  2. thank u sir.........its really interesting

  3. good afternoon Sir,
    i am a student of 9A
    Sir I request you to give me a schedule to revise the zoology syllabus to the extent possible.yesterday we had practicals and we could not study much.and moreover it is taking a lot of time to revise.sir please help me out.
    Thank you

  4. thank u for such a good information sir.its really awesome learning with such good diagramatic examples,i am student of SM-1

  5. thanks sir 4r giving the extra information and images im a student of sm-2{boy)......2day i did not listen 2 ur class plz explain 2morrow sir plz

  6. Thank you sir.I am an student of SLB-1B.These images are very useful in understanding the joints