TANILON, Pauline Joy B.
ACTIVITY 3: Exercises
A. 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 sphenoid bone is the yellow bone shown in the video that is centrally located and joins with most of the other bones of the skull.
B. 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?
The two mechanisms by which the bones of the body are formed are intramembranous ossification and endochondral ossification.
In intramembranous ossification, the flat bones of the skull, most of the facial bones, mandible (lower jawbone), and the medial part of the clavicle (collar bone) are formed.
On the other hand, most bones of the body are formed through endochondral ossification, but it is best observed in long bones.
C. 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.
1. What are the synovial joints being described in the video?
The synovial joints described in the video are:
- Gliding (planar) Joints
- Ball and Socket Joints
- Hinge Joints
- Pivot Joints
- Condyloid Joints
- Saddle Joints
2. Which type of synovial joint allows for the widest ranges of motion?
The ball and socket joints are the type of synovial joint that allows for the widest ranges of motion.
References:
Tortora, G. J., & Derrickson, B. (2014). Principles of Anatomy and Physiology (14th ed.). Wiley.