Final answer:
The scapula and acromion are parts of the shoulder, with the scapula being a key component of the pectoral girdle and the acromion forming the tip of the shoulder.
Step-by-step explanation:
The scapula and acromion are parts of the shoulder. The scapula, also referred to as the shoulder blade, is a part of the pectoral girdle and plays a crucial role in anchoring the upper limb to the body. It is located on the posterior side of the shoulder and is connected to the trunk solely by muscles, allowing a wide range of motion. The acromion is a bony process that extends laterally from the scapular spine to form the bony tip of the shoulder, and it is part of the acromioclavicular joint, which articulates with the clavicle.