Skeletal System Part One Axial

​The axial skeleton is the part of the skeleton that consists of the bones of the head and trunk of a vertebrate. In the human skeleton, it consists of 80 bones and is composed of six parts; the skull (22 bones), also the ossicles of the middle ear, the hyoid bone, the rib cage, sternum and the vertebral column. The axial skeleton together with the appendicular skeleton form the complete skeleton. Another definition of axial skeleton is the bones including the vertebrae, sacrum, coccyx, skull, ribs, and sternum.^[1]

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1. ​0- 33 Axial

2. 21: ​37 to 21:42

3. 21:42 to 22:50

4. ​22:50 to 23:31

5. ​31:09 to 33:01

6. Ossicles ​https://www.youtube.com/watch?v=6LkmzBOHkyc

https://www.youtube.com/watch?v=KyMCmIpKuCA

CRANIUM (SKULL)​

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​The main function of the bones of the skull along with the surrounded meninges, is to provide protection and structure. Protection to the brain (cerebellum, cerebrum, brainstem) and orbits of the eyes.

OSSICLES BONES (inner ear bones)

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​The smallest bones in the body, the auditory ossicles, are three bones in each middle ear that work together to transmit soundwaves to the inner ear—thereby playing an essential role in hearing. When sound travels through the ear canal, the eardrum vibrates.

​HYOID BONE:

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Together with its attached muscles, the hyoid bone has two important functions: it holds up the tongue, which sits above it, and it holds up the larynx, which hangs below it. It also transmits the force of muscles that help to open the jaw.

THORACIC CAGE (rib cage):

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The ribs are connected to the sternum with a strong, somewhat flexible material called cartilage. The rib cage help protects the organs in the chest, such as the heart and lungs, from damage

VERTEBRAL COLUMN (spine):

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The major function of the vertebral column is protection of the spinal cord; it also provides stiffening for the body and attachment for the pectoral and pelvic girdles and many muscles. In humans an additional function is to transmit body weight in walking and standing.