location of spongy and compact bone in a flat bone

Red marrow fills the spaces in the spongy bone.

The wider section at each end of the bone is called the epiphysis (plural = epiphyses), which is filled with spongy bone. The walls of the diaphysis are composed of dense and hard compact bone.įigure 6.7 Anatomy of a Long Bone A typical long bone shows the gross anatomical characteristics of bone. The hollow region in the diaphysis is called the medullary cavity, which is filled with yellow marrow.

The diaphysis is the tubular shaft that runs between the proximal and distal ends of the bone. A long bone has two parts: the diaphysis and the epiphysis. The structure of a long bone allows for the best visualization of all of the parts of a bone ( Figure 6.7). This section will examine the gross anatomy of bone first and then move on to its histology. Later discussions in this chapter will show that bone is also dynamic in that its shape adjusts to accommodate stresses. Bone is hard and many of its functions depend on that characteristic hardness. Describe how bones are nourished and innervatedīone tissue (osseous tissue) differs greatly from other tissues in the body.Identify the structures that compose compact and spongy bone.Compare and contrast compact and spongy bone.Define and list examples of bone markings.Identify the anatomical features of a bone.They are not always present.By the end of this section, you will be able to: Sutural bones are very small bones that are located between the major bones of the skull, within the joints (sutures) between the larger bones.The patella (knee cap) is an example of a sesamoid bone. Sesamoid bones hold tendons farther away from joints so the angle of the tendons is increased, thus increasing the leverage of muscles. Sesamoid bones are embedded in tendons, the connective tissues that bind muscles to bones.Most of the bones of the skull are flat bones, as is the sternum (breast bone). Flat bones are thin and generally curved, with two parallel layers of compact bone sandwiching a layer of spongy bone.The bones of the wrists and ankles are short bones.

Short bones are roughly cube-shaped and have only a thin layer of cortical bone surrounding a spongy bone interior.Most bones of the limbs, including those of the fingers and toes, are long bones. Long bones are made mostly of compact bone, with lesser amounts of spongy bone and marrow. Long bones are characterized by a shaft that is much longer than it is wide and by a rounded head at each end of the shaft.

Location of spongy and compact bone in a flat bone