What pectoral girdle bone is freely movable?

The clavicle is an S-shaped bone that forms the anterior portion of the shoulder girdle that keeps the arm away from the trunk, allowing it to move freely. The clavicle has 2 articulations, the sternoclavicular joint and the acromioclavicular joint.

What type of joint is the pectoral girdle?

This joint provides the direct attachment between your upper extremity and axial skeleton, and also allows your clavicle to move in three different planes. Scapulothoracic joint. Also known as the scapulocostal joint, this is where the scapula bone meets the ribs in the back of your chest.

What moves the pectoral girdle?

Muscles That Position the Pectoral Girdle The anterior muscles include the subclavius, pectoralis minor, and serratus anterior. The posterior muscles include the trapezius, rhomboid major, and rhomboid minor. The muscles that stabilize the pectoral girdle make it a steady base on which other muscles can move the arm.

Which bones make up the pectoral girdle and free upper limb?

The pectoral girdle consists of the clavicle and the scapula, which serve to attach the upper limb to the sternum of the axial skeleton.

What is pectoralis minor?

Pectoralis minor is a small muscle in the anterior chest wall that attaches from the ribs to the coracoid process of the scapula, and assists with stabilisation of the shoulder complex, protraction of the shoulders, and plays a small role in elevating the ribs for inspiration.

How many joints are in the pectoral girdle?

The shoulder and arm bone are joined together by ligaments. The joints allow the shoulder to move your arm up and down, in circles, in front, and toward the back. You may think of the shoulder as one joint, but there are three in the pectoral girdle: sternoclavicular, acromioclavicular, and glenohumeral.

Which of the following is a muscle that positions the pectoral girdle?

Muscles that position the pectoral girdle are located either on the anterior thorax or on the posterior thorax (Figure and Table). The anterior muscles include the subclavius, pectoralis minor, and serratus anterior. The posterior muscles include the trapezius, rhomboid major, and rhomboid minor.

Do chest muscles stabilize the shoulder muscles?

Pectoralis minor is a thin, triangular muscle located beneath the pectoralis major. It attaches to the ribs, and serves to stabilize the scapula, the large bone of the shoulder. The pectoral fascia is a thin layer of tissue over the pectoralis major, extending toward the latissimus dorsi muscle on the back.

Why is the pectoral girdle weak?

The pectoral girdle is weaker than the pelvic girdle because the pelvic girdle is the primary weight-bearing and locomotion structure for the body…

What are two differences between the pelvic and pectoral girdles?

The pelvic girdle transfers upper body weight to the lower limbs by articulating with the spine….Complete answer:

Pectoral girdle	Pelvic girdle
It is same in both males and females	Women majorly have gynaecoid pelvis and males have android pelvis
It helps in holding, lifting, etc	It helps in standing, jumping, etc

Why the pelvic girdle is more stable than pectoral girdle?

The pelvic girdle allows greater mobility than the pectoral girdle. The pelvic girdle is more firmly attached to the axial skeleton than the pectoral girdle in order to provide the stability needed to support the weight of the upper body.

What are the two bones that make up the pectoral girdle?

The pectoral girdle is made up of two major bones: the clavicle and scapula. Clavicle bone. The clavicle or collarbone is an S-shaped bone situated at the front of your body in a horizontal position.

Where is the shoulder girdle located in the body?

A pectoral girdle, also referred to as the shoulder girdle, connects your upper limbs to the bones along the axis of your body. You have two pectoral girdles in your body.