The clavicle articulates with the manubruim of the sternum, this provides a direct connection between the pectoral girdle and axial skeleton. The connection allows for maximum movement without constrains. The lower girdle in animals that walk upright has to bear more weight than the upper girdle.
The pelvic girdle is a solid box of bone: maximum security and ability to bear weight. The pectoral girdle is much more flexible, but less secure, comprising just the scapula, clavicle if present , and proximal end of humerus.
As such, it is more commonly injured, with less force, than the pelvic girdle. Yes, much more flexible than the pelvic girdle. The thoracic cage. The pectoral girdle is composed of the clavicle collar bone and scapula shoulder blade. Log in. Human Anatomy and Physiology. Study now. See Answer. Best Answer. The pectoral girdle is an incomplete ring because it is open in the back between the scapulae.
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What is the purpose of the myelin sheath. And you know what's incredible about that? You wouldn't be able to use your arms without the shoulder girdle! Image from Human Anatomy Atlas. Be sure to subscribe to the Visible Body Blog for more anatomy awesomeness! Are you an instructor? We have award-winning 3D products and resources for your anatomy and physiology course!
Learn more here. When you select "Subscribe" you will start receiving our email newsletter. Use the links at the bottom of any email to manage the type of emails you receive or to unsubscribe. See our privacy policy for additional details. Welcome to the Visible Body Blog! I'm fascinated by the shoulder girdle, to be honest. It's such an interesting group of structures and presents an even more interesting joint.
Let's take a quick look, shall we? Bones of the Shoulder Girdle The shoulder girdle is made up of two posterior scapulae and two anterior clavicles. These bones make an incomplete ring around the upper thoracic cage. The medial end of each clavicle articulates with the manubrium and scapulae; each scapula connects to the thoracic cage by muscle only.
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