Activity 3. Exercises
Watch this video to view a rotating and exploded skull with color-coded bones. Which bone (yellow) is centrally located and joins with most of the other bones of the skull? The link of the video at the study guide.
The bone that is centrally located and joins with most of the other bones of the skull is the Sphenoid bone.
View another video to review the two processes that give rise to the bones of the skull and the body. The access of the video is in the study guide. Answer this question:
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 of bone formation and these are intramembranous and endochondral ossification. Intramembranous ossification occurs on or within fibrous connective and tissue membranes. The bones formed by this mechanism are the flat bones of the skull, mandible, and clavicles. On the other hand, endochondral ossification is a process in which bones develop from hyaline cartilage. Most of the bones of the body except the flat bones created by the intramembranous ossification are made by this mechanism.
Watch another video (link at the study guide) to see an animation of synovial joints in action. Answer the following questions after watching the video.
What are the synovial joints described in the video?
The synovial joints that are described in the video are the planar, hinge, pivot, condyloid, saddle, and ball-and-socket joints. These types of joints have different functions and they allow the body to move in different ways. The following are descriptions of their functions in our body:
-
Planar Joints: for gliding movements
-
Hinge Joints: allows one bone to move while the other bone is stationary
-
Pivot Joints: rotational movement
-
Condyloid Joints: angular movement
-
Saddle Joints: angular movements but with a greater range of motion
-
Ball-and-socket joints: allows the greatest range of motion
Reference:
38.12: Joints and Skeletal Movement - Types of Synovial Joints. (2018, July 16). Biology LibreTexts. https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Book%3A_General_Biology_(Boundless)/38%3A_The_Musculoskeletal_System/38.12%3A_Joints_and_Skeletal_Movement_-_Types_of_Synovial_Joints
Which type of synovial joint allows for the widest ranges of motion?
The type of synovial joint that allows for the widest ranges of motion is the ball-and-socket joint.