Question

Distinguish between pectoral and Pelvic girdle.

Answer 1

Hint: Study of bones or endoskeleton situated in shoulder region (pectoral girdle) and hip region (pelvic girdle) provides the information about the structure and function of endoskeleton.

Complete Answer:

Sl.No	Pectoral girdle	Pelvic girdle
1.	It is situated in the shoulder region.	It is situated in the hip region.
2.	It is not attached to the vertical column.	It is attached to the vertical column.
3.	It is a set of 4 bones which connects to the arm on each side	It consists of two bones.
4.	The glenoid cavity is the scapula that forms the ball and socket joint with the humerus.	A cup shaped cavity called acetabulum forms a ball socket joint with the femur.
5.	It gives articulation to forelimb bones.	It gives articulation to bind limb bones.
6.	The back muscles are attached to the pectoral girdle.	The hip muscles are attached to the pelvic girdle.
7.	It is relatively less stronger.	It is relatively more strong.
8.	These perform functions like holding, lifting, etc.	These perform the functions like running, standing, jumping, etc.

Note: The structural and functional differences of the endoskeleton of shoulder and hip portion can give us more details about our endoskeleton.
Similarities between Pectoral girdle and Pelvic girdle: Both of them serve as points of attachment for the appendicular skeleton to the axial skeleton.