What does the humerus bone protect?

What does the humerus bone protect?

The Largest Bone in the Upper Arm The bottom of the humerus touches the top of the radius and ulna which joins the upper arm with the lower arm. The meeting of these bones allows for the wide range of motion which is possible at the shoulder joint, along with movement at the elbow.

Where does the humerus shaft attach?

Humerus: The humerus attaches proximally to the scapula (shoulderblade) at the humeral head and distally with the radius and ulna (lower-arm bones) at the trochlea and capitulum, respectively. The proximal portion of the humerus can be divided into three parts.

What is the humerus responsible for in the shoulder?

The humerus. This is the bone of the upper arm. The top of the humerus is rounded and fits into the shallow socket of the scapula, called the glenoid cavity, creating the shoulder’s ball-and-socket joint. This ball-and-socket construction allows for the arm’s large range of motion.

What are the features of the humerus?

The humeral upper extremity consists of a rounded head, a narrow neck, and two short processes (tubercles, sometimes called tuberosities). The body is cylindrical in its upper portion, and more prismatic below.

What part of the body is humerus?

upper arm
The humerus is the bone in your upper arm. It’s located between your elbow and your shoulder, and consists of several parts that allow it to move freely in different directions.

What muscles connect to the humerus?

The pectoralis major, latissimus dorsi, deltoid, and rotator cuff muscles connect to the humerus and move the arm.

What is the most distal feature of the humerus?

The distal end of the humerus has two articulation areas, which join the ulna and radius bones of the forearm to form the elbow joint. The more medial of these areas is the trochlea, a spindle- or pulley-shaped region (trochlea = “pulley”), which articulates with the ulna bone.

What is the function of the humerus muscle?

The function of the humerus. The humerus links the elbow to the shoulder blade. It provides support to the major muscles of the shoulder, the upper arm, as well as the lower arm.

Where does the humerus start and end in the arm?

The humerus is the long bone of the upper arm of human beings and other tetrapod vertebrates. This bone originates from the shoulder blade known as the scapula and ends at the elbow. The anatomy of the humerus. In terms of structure, the humerus serves as a connection between the scapula and the elbow, where it links to the two lower arm bones.

What is the function of the capitulum in the humerus?

Capitulum: The capitulum is the part of the humerus that interacts with the radius bone of your lower arm. Fossae: You have three fossae, which are depressions that help to accommodate the bones of your lower arm when your elbow joint is moved.

What is the shape of the humeral shaft?

The humeral shaft is cylindrical proximally, and it transitions to a triangular shape just prior to the distal metaphysis. Proximally on the anterior humerus from lateral to medial are the insertion sites of the pectoralis major tendon, the latissimus dorsi, and the teres major.

What is the function of the head of the humerus?

In situations such as these, medical intervention can assist with bone lengthening techniques to achieve a more normalized and functional appearance of the bone. The head of the humerus makes up a portion of the ball-and-socket shoulder joint. This area also serves as the insertion point for muscles which make up the shoulder girdle.

Which is more important the scapula or the humerus?

The rhythm between the scapula and the humerus is a very important one for adequate shoulder function. Another important landmark is the anatomical neck, a slightly more narrow area just below the tubercles but above the shaft, which is the long part of the bone.

The humeral shaft is cylindrical proximally, and it transitions to a triangular shape just prior to the distal metaphysis. Proximally on the anterior humerus from lateral to medial are the insertion sites of the pectoralis major tendon, the latissimus dorsi, and the teres major.

Which is the distal end of the humerus?

It is a comparatively thick bone with a large, smooth head at the proximal end and a number of projections a.k.a. “ process ” at the distal end. The proximal end of the humerus consists of. The head. The anatomical neck. The greater and lesser tubercles. The surgical neck. The superior half of the shaft of the Humerus.