The function of the scapula is to provide movement and stabilization of the arm at the shoulder by attaching it to the trunk of the body, known as the thorax. The scapula is a flat bone that is shaped somewhat like a triangle. The scapula, along with the clavicle and humerus, make up the shoulder.
The scapula lies over the second to seventh ribs and is tilted at a 30-degree angle. It is surrounded by 17 muscles that help to provide movement and control to the area. Ligaments attach the top of the scapula to the clavicle while the outer side is attached to the humerus bone by a socket.The humerus and scapula form a ball and socket joint, which is one of the body's most flexible joints.Learn More
According to Healthline, the human arm is composed of three bones, divided amongst two anatomical sections. The upper arm or brachium, which is the region between the shoulder and elbow joint, contains the humerus. The forearm or antebrachium contains two parallel bones, the radius and ulna.Full Answer >
According to Arizona State University (ASU), "spongy" bone is not dense because it contains holes or "pores." These open areas contain blood marrow, nerves, and blood vessels that transport cells and nutrients. Although the appearance of these bones resembles a sponge, they are actually very hard.Full Answer >
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 >
According to BBC, an endoskeleton is a bone structure located in the interior of an animal, and an exoskeleton is a bone structure located on the exterior of an animal. Each type of skeleton has unique advantages and disadvantages in helping the animal survive.Full Answer >