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Like other structure/function relationships in the body, their shapes and their functions are related such that each categorical shape of bone has a distinct function. Figure 6.2.1 – Classifications of Bones: Bones are classified according to their shape. A long bone is one that is cylindrical in shape, being longer than it is wide.
Which is the hollow shaft at the distal end of the bone?
The diaphysis is the hollow, tubular shaft that runs between the proximal and distal ends of the bone. Inside the diaphysis is the medullary cavity, which is filled with yellow bone marrow in an adult.
What are the two main parts of a long bone?
Long bones provide the leverage we need for moving our bodies and for manipulating our environment. All long bones have two main parts: diaphysis and epiphysis. The diaphysis is the shaft of the long bone, the main body. The diaphysis is a tube with a hollow center called the medullary cavity (or marrow cavity).
Which is an example of a flat bone?
The term flat bone is somewhat of a misnomer because, although a flat bone is typically thin, it is also often curved. Examples include the cranial (skull) bones, the scapulae (shoulder blades), the sternum (breastbone), and the ribs. Flat bones serve as points of attachment for muscles and often protect internal organs.
What kind of bone is shaped like a sesame seed?
A sesamoid bone is a small, round bone that, as the name suggests, is shaped like a sesame seed. These bones form in tendons (the sheaths of tissue that connect bones to muscles) where a great deal of pressure is generated in a joint.
How are the 206 bones in an adult skeleton classified?
The 206 bones that compose the adult skeleton are divided into five categories based on their shapes (Figure 6.6). Their shapes and their functions are related such that each categorical shape of bone has a distinct function. Figure 6.6. Classifications of Bones
How are the bones of an adult divided?
The 206 bones that compose the adult skeleton are divided into five categories based on their shapes (Figure 1). Their shapes and their functions are related such that each categorical shape of bone has a distinct function. Figure 1. Classifications of Bones.
Which is an example of an irregular bone?
Irregular Bones An irregular bone is one that does not have any easily characterized shape and therefore does not fit any other classification. These bones tend to have more complex shapes, like the vertebrae that support the spinal cord and protect it from compressive forces.