Final answer:
Cats do not have clavicle-scapular articulation and rely on muscle groups to stabilize their scapulae, unlike the human pectoral girdle which includes clavicles connecting to the skeletal frame.
Step-by-step explanation:
Cats do not have the clavicle-scapular articulation to stabilize the scapula like humans do. Instead, they rely on muscle groups to stabilize their scapulae. Unlike humans, who have a robust pectoral girdle consisting of the clavicle and scapula attaching the upper limbs to the axial skeleton, cats have a very flexible shoulder attachment without a direct skeletal link to the torso. This arrangement, without a true clavicular connection, allows for their remarkable agility and the ability to squeeze through tight spaces. The pectoral girdle in humans helps to transfer force from the upper limbs to the thorax and it is anchored in place by muscles, ligaments, and bones, but the lack of a bony connection in cats means that muscular support is crucial for shoulder stabilization.