Q:

How is the arm held clear of the widest dimension of the thoracic cage?

A:

Quick Answer

The clavicle, which is also known as the "collarbone," serves numerous functions, one of which is as a strut to dangle the arm out of the thoracic cage's width, according to Boundless. The clavicle is wider than the ribcage, so the arm is connected to its end, clearing the thorax.

 Know More

Full Answer

The scapula, or "shoulder blade," also serves to keep the arm from colliding with the ribcage, according to Boundless. The scapula pushes against the ribcage to provide balance and leverage whenever the arm is lifted, pushed forward or pulled backward. It is the combination of three pieces (arm, clavicle and shoulder blade).

Learn more about Bones

Related Questions

  • Q:

    What does the scapula and clavicle form?

    A:

    The scapula connects with the clavicle to form the shoulder or pectoral girdle. The shoulder girdle is part of the appendicular skeleton that makes up the arms and legs in human anatomy.

    Full Answer >
    Filed Under:
  • Q:

    What bones make up the shoulder girdle?

    A:

    There are three bones that make up the shoulder girdle; these include the scapula, the humerus and the clavicle. The shoulder girdle anatomy consists of various articulations that connect the arm to the skeleton and provide movement.

    Full Answer >
    Filed Under:
  • Q:

    How much pressure breaks a clavicle?

    A:

    It takes approximately 7 pounds of pressure to break a human clavicle, or collarbone. The clavicle is made up of a single, long, thin bone, one of two that extends from the shoulder blades to the breastbone. Commonly, the clavicle is broken by falling on the shoulder.

    Full Answer >
    Filed Under:
  • Q:

    What are the functions of bone markings?

    A:

    Bone markings are characteristics on the surface of the axial and appendicular bones that indicate attachments, articulations or openings for nerves and blood vessels, explains Boundless. Examples of attachment bone markings include fossa, ramus and condyle. Examples of openings for nerves and blood vessels include fissure, foramen and meatus.

    Full Answer >
    Filed Under:

Explore