Question

Which of the following bones make up one pectoral girdle?

1) Scapula and clavicle
2) Femur and tibia
3) Humerus and radius
4) Ulna and fibula

Answer 1

The bones that compose one pectoral girdle are the scapula and clavicle, which serve as attachment points for the upper limbs to the axial skeleton.

Step-by-step explanation:

The bones that make up one pectoral girdle are the scapula and clavicle. The pectoral girdle, also known as the shoulder girdle, attaches the upper limbs to the trunk of the body, providing points of attachment for the upper limbs to the axial skeleton.

The clavicle, or collarbone, is an S-shaped bone that is located on the anterior side of the shoulder and attaches at its medial end to the sternum, while the lateral end joins with the scapula just above the shoulder joint. The scapula is a flat bone that plays a key role in forming the shoulder joint.

Answer 2

The bones that make up one pectoral girdle are the scapula and clavicle. They allow for a wide range of motion and force transfer from the upper limbs to the thorax, enhancing shoulder mobility. Option 1 is the correct answer.

Step-by-step explanation:

The pectoral girdle is crucial in connecting the upper limbs to the axial skeleton in human anatomy. The bones that comprise one pectoral girdle are the scapula and the clavicle. The clavicle, commonly known as the collarbone, is an S-shaped bone situated on the anterior side of the shoulder.

It connects medially to the sternum of the thoracic cage. The scapula, or shoulder blade, is a flat, pear-shaped bone that helps form the shoulder joint. Together, these bones facilitate a wide range of motion in the upper limbs and transfer force from the upper limbs to the thorax, enhancing the functionality and mobility of the shoulder.

From the options provided, 1) Scapula and clavicle are the correct bones that make up one pectoral girdle.