Thorax Anatomy
What is the thorax responsible for protecting?
Lungs & Heart
What large triangular-shaped bone serves as the attachment site for 17 muscles that move the arm?
Scapula
This bone is also known as the "breastbone"
Sternum
This structure connects the ribs to the sternum, allowing for flexibility in the rib cage.
Costal cartilage
What process, meaning “highest shoulder,” helps transfer force from the humerus through the scapula and clavicle?
Acromion process
What are the two ribs that do not articulate with the sternum called?
Floating ribs
What are the four joints that make up the shoulder?
SC-joint, AC-joint, GH-joint, Scapulothoracic joint
What joint is formed by the articulation of the acromion process and the clavicle?
Acromioclavicular joint (AC-joint)
Where does the medial end of the clavicle articulate to form the sternoclavicular joint?
Manubrium of the sternum
What part of the humerus forms the ball in the ball-and-socket shoulder joint?
Head of the humerus
How many ribs have their own individual costal cartilage attachment to the sternum?
Seven (True ribs)
What is the longest bone in the upper extremity, which serves as an attachment site for muscles moving the arm, elbow, and hand?
Humerus
What "S-shaped" bone helps brace the shoulders and prevent forward motion?
Clavicle
What is the most distal part of the sternum, located just above the diaphragm, which can cause the sensation of being "winded" if struck?
Xiphoid process
Which part of the sternum is located superiorly and articulates with the clavicle and first rib
Manubrium
What three parts make up the sternum?
Manubrium, body, and xiphoid process
What is the cavity on the scapula that articulates with the head of the humerus to form the Glenohumeral joint?
Glenoid cavity (fossa)
What bone connects the shoulder blade to the sternum and forms part of both the SC-joint and AC-joint?
Clavicle
What is the hook-like structure on the scapula that serves as a landmark during surgeries due to its proximity to neurovascular structures?
Coracoid process
How many pairs of ribs articulate with the thoracic spine via the transverse processes?
Twelve