Activity 3. Exercises

PAREJA, Austine Dave F. - Activity 3

PAREJA, Austine Dave F. - Activity 3

by Austine Dave Pareja -
Number of replies: 0

 

  1. Which bone (yellow) is centrally located and joins with most of the other bones of the skull? 

  • The centrally located bone that joins with most of the other bones of the skull is the sphenoid bone. 

 

  1. What are the two mechanisms by which the bones of the body are formed and which bones are formed by each mechanism?

  • There are two mechanisms by which bones of the body are formed, intramembranous ossification and endochondral ossification. Intramembranous ossification is a process that occurs within fibrous connective tissue membranes and skull bones in childhood. The bones that are formed by intramembranous ossification are the flat bones of the skull, clavicle, and cranial bones. Endochondral ossification, on the other hand, is the replacement of cartilage with bone. Based on the process explained in the video, it can be inferred that long bones of the axial skeleton such as ribs and vertebrae, and limbs which are under the appendicular skeleton, are formed through endochondral ossification.



     What are the synovial joints being described in the video?

 

  • The synovial joints being described in the video are: ball-and-socket joint, hinge joint, pivot joint, saddle joint, condyloid joint, and plane joint.

 

     Which type of synovial joint allows for the widest ranges of motion?

  • The synovial joint that allows for the widest ranges of motion is the ball-and-socket joint as this joint is composed of a bone that is well fitted to the concave articulation of the adjacent bone; hence, a wide range of motion could be done. This joint is present in our shoulders and hip.